Accounts Payable, Current Accounts payable Accounts Receivable, Net, Current Accounts receivable Accrued Income Taxes, Current Income taxes payable Accrued Liabilities, Current Accrued expenses and other Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Pension Liability [Member] Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: Accumulated depreciation and amortization Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Derivatives [Member] Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Net Unrealized Gain (Loss) on Securities [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss), Net of Tax Ending Balance Beginning Balance Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Foreign Currency [Member] Additional Paid in Capital, Common Stock Additional paid-in capital Additional Paid-in Capital [Member] Additional Paid-In Capital [Member] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Allocated Share-based Compensation Expense Share-based compensation expense Total share-based compensation expense related to stock options and share purchase plans Other Segments [Member] Other [Member] Amendment Flag Amendment Flag Amortization of Debt Issuance Costs and Discounts Amortization of debt origination fees Amortization of Intangible Assets Amortization expense of intangible assets Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive shares excluded from the computation of earnings per share Asset-backed securities and other. Asset Backed Securities And Other [Member] Asset-Backed Securities and Other [Member] Assets Assets Assets [Abstract] Assets Assets, Current Total current assets Assets, Current [Abstract] Current assets: Assets, Fair Value Disclosure Total Assets, Noncurrent, Other than Noncurrent Investments and Property, Plant and Equipment Assets, Noncurrent, Other than Noncurrent Investments and Property, Plant and Equipment Auto Parts Locations [Member] Auto Parts Locations [Member] Auto Parts Locations [Member] Available-for-sale Securities Available-For-Sale Marketable Securities, Fair Value Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Available-For-Sale Marketable Securities, Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Available-For-Sale Marketable Securities, Gross Unrealized Losses Available-For-Sale Marketable Securities, Gross Unrealized Losses Available-for-sale Securities, Amortized Cost Basis Available-For-Sale Marketable Securities, Amortized Cost Basis Available-for-sale Securities, Current Other current assets Short-term marketable securities The time period allotted for available-for-sale securities to mature. Available For Sale Securities Debt Maturity Period Range Available for sale securities debt maturity period range Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Number of securities available for sale loss position Available-for-sale Securities, Noncurrent Long-term marketable securities Other long-term assets Available-for-sale Securities [Table Text Block] Available-for-Sale Marketable Securities Award Type [Axis] Award Type [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Purchase price allocation, intangible assets Capital leases. Capital Leases [Member] Capital Leases [Member] Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Commercial Paper [Member] Commercial paper, weighted average interest rate of 0.72% and 0.45% at May 7, 2016 and August 29, 2015, respectively [Member] Commitments and Contingencies Commitments and contingencies Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Common Stock, Value, Issued Common stock, par value $.01 per share, authorized 200,000 shares; 30,229 shares issued and 29,501 shares outstanding as of May 7, 2016; 32,098 shares issued and 30,659 shares outstanding as of August 29, 2015 Compensation and Retirement Disclosure [Abstract] Compensation and Retirement Disclosure [Abstract] Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Loss Corporate Debt Securities [Member] Corporate Securities [Member] Cost of Goods and Services Sold Cost of sales, including warehouse and delivery expenses Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Current Fiscal Year End Date Current Fiscal Year End Date Customer Relationships [Member] Customer Relationships [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Financing Debt Instrument [Axis] Debt Instrument [Axis] Long-term Debt, Gross Long-term debt before discounts and debt issuance costs Debt Instrument, Fair Value Disclosure Fair value of the Company's debt Debt Instrument, Interest Rate, Effective Percentage Effective interest rate Debt Instrument, Interest Rate, Stated Percentage Stated interest rate percentage Debt Instrument, Interest Rate Terms Interest accrual on foreign currency loans the basis points Debt Instrument [Line Items] Debt Instrument [Line Items] Maturity date (by month and year) for debt instrument. Debt Instrument Maturity Month And Year Debt instrument maturity, month and year Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] The unamortized discount and debt issuance costs associated with debt instruments. Debt Instrument Unamortized Discount And Debt Issuance Costs Less: Discounts and debt issuance costs Debt, Long-term and Short-term, Combined Amount Total debt Total debt Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Deferred income taxes Deferred Tax Liabilities, Net, Current Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Deferred income taxes Defined Benefit Plan, Amortization of Gains (Losses) Amortization of net loss Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease) Change to net periodic pension expense Defined Benefit Plan, Contributions by Employer Annual contributions by the Company to pension plans Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan, Expected Return on Plan Assets Expected return on plan assets Defined Benefit Plan, Interest Cost Interest cost Defined Benefit Plan, Net Periodic Benefit Cost Net periodic pension expense Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year Expected contributions to the plans by the Company in fiscal 2016 Depreciation, Depletion and Amortization Depreciation and amortization of property and equipment and intangibles Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Financial Instruments Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Derivative losses recorded in Accumulated other comprehensive loss Description of recently adopted accounting pronouncements. Description Of New Accounting Pronouncements Adopted [Policy Text Block] Recently Adopted Accounting Pronouncements Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Share-Based Payments Document and Entity Information. Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Earnings Per Share, Basic Basic earnings per share Earnings Per Share, Diluted Diluted earnings per share Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash Employee Stock Option [Member] Stock Options [Member] Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Equity [Abstract] Equity [Abstract] Equity Component [Domain] Equity Component [Domain] Excess of Replacement or Current Costs over Stated LIFO Value Unrecorded adjustment for LIFO value in excess of replacement value Excess Tax Benefit from Share-based Compensation, Financing Activities Income tax benefit from exercise of stock options Excess Tax Benefit from Share-based Compensation, Operating Activities Income tax benefit from exercise of stock options Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value Measurements Fair Value, Inputs, Level 1 [Member] Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Level 2 [Member] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Option, Aggregate Differences, Long-term Debt Instruments Excess (shortfall) of fair value of debt over (from) carrying value Finite lived and indefinite lived intangible assets. Finite Lived And Indefinite Lived Intangible Assets [Line Items] Finite Lived And Indefinite Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Accumulated Amortization Finite Lived, Accumulated Amortization Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Gross Finite Lived, Gross Carrying Amount Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Net Finite Lived, Net Carrying Amount Finite-Lived Intangible Asset, Useful Life Estimated Useful Life Fiscal Period, Policy [Policy Text Block] Fiscal Period Reporting periods. Fiscal Periods Description of reporting periods Goodwill Goodwill Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangibles Gross Profit Gross profit Gross profit Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income taxes Income Statement [Abstract] Income Statement [Abstract] Income Tax Expense (Benefit) Income taxes Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Income Taxes Payable Income taxes payable Increase (Decrease) in Finished Goods and Work in Process Inventories Merchandise inventories Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Other Operating Assets and Liabilities, Net Other, net The increase in the value that is authorized to be repurchased under the stock repurchase program. Increase In Amount Authorized Under Stock Repurchase Program Increase in authorization of stock repurchase, value Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets (Excluding Goodwill) Non-amortizing intangible asset - Trade name, Net Carrying Amount Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Intangible Assets, Net (Excluding Goodwill) Total intangible assets other than goodwill, Net Carrying Amount Interamerican Motor Corporation [Member] Interamerican Motor Corporation [Member] Interamerican Motor Corporation [Member] Interest Income (Expense), Nonoperating, Net Interest expense, net Interest expense, net Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Net derivative losses amortized into Interest expense Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Net derivative loss expected to be reclassified over next 12 months Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Inventory Disclosure [Text Block] Merchandise Inventories Inventory, Finished Goods, Net of Reserves Merchandise inventories Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Marketable Securities Legal Matters and Contingencies [Text Block] Litigation Letter of Credit [Member] Letters of Credit [Member] Letters of Credit Outstanding, Amount Letters of credit, outstanding Liabilities and Equity Liabilities and Stockholders' Deficit Liabilities and Equity [Abstract] Liabilities and Stockholders' Deficit Liabilities, Current Total current liabilities Liabilities, Current [Abstract] Current liabilities: Long-term Line of Credit Borrowings, outstanding Line of Credit Facility, Current Borrowing Capacity Amount available under credit facility Line of Credit Facility, Expiration Date Credit facility expiration date Line of Credit Facility, Expiration Period Extended expiration of credit facility Time period in which the credit facility expires. Line Of Credit Facility Expiration Year Expiration of credit facility Line of Credit Facility, Interest Rate Description Credit facility interest rate description Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of Credit Facility, Maximum Borrowing Capacity Maximum amount available under credit facility Line of Credit Facility, Remaining Borrowing Capacity Remaining borrowing capacity under revolving credit facility Line of Credit Facility [Table] Line of Credit Facility [Table] The number of days prior to the expiration date, required to extend or modify the line of credit facility. Line Of Credit Facility Term Prior To Expiration Period Line of credit facility extension or modification period prior to expiration Long-term Commercial Paper Commercial paper Long-term Debt, Current Maturities Less: Short-term borrowings Long-term Debt, Excluding Current Maturities Long-term debt Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Long-term Debt, Weighted Average Interest Rate Weighted average interest rate of commercial paper Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Amount transferred by the Company's insurance captive to a Trust Account for future obligations. Marketable Securities Transferred To Trust Account Marketable securities transferred Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Collateralized Mortgage Backed Securities [Member] Mortgage-Backed Securities [Member] Multi Year Revolving Credit Agreement [Member] Multi Year Revolving Credit Agreement [Member] Multi Year Revolving Credit Agreement [Member] Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities: Net Income (Loss) Attributable to Parent Net income Net income New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Pronouncements Noncompete Agreements [Member] Noncompete Agreements [Member] Number of Operating Segments Number of operating segments Number of Reportable Segments Number of reportable segments Number of Stores Number of automotive parts and accessories locations in the United States, Puerto Rico, Mexico, and Brazil Operating Income (Loss) Operating profit Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] General Other Assets, Current Other current assets Other Assets, Noncurrent Other long-term assets Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Unrealized gains on marketable securities, net of taxes Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Net derivative activities, net of taxes Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Net of Tax Total other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive loss: Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Pension liability adjustments, net of taxes Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax Pension liability adjustments, taxes Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Net derivative activities, taxes Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Unrealized gains on marketable securities, taxes Unrealized losses on marketable securities, taxes Other Liabilities, Noncurrent Other long-term liabilities Payment and or Proceeds from the disposal of capital asset(s) and other. Payments For Proceeds From Capital Assets And Others Disposal of capital assets and other, net Payments for Repurchase of Common Stock Purchase of treasury stock Payments to Acquire Businesses, Net of Cash Acquired Acquisition of outstanding stock Acquisition of business, net of cash Payments to Acquire Intangible Assets Purchase of intangibles Purchase of intangibles Payments to Acquire Marketable Securities Purchase of marketable securities Payments to Acquire Property, Plant, and Equipment Capital expenditures Pension and Other Postretirement Benefits Disclosure [Text Block] Pension and Savings Plans Penalty percentage assessed from extending expiration period. Percentage Of Penalty For Extending Expiration Period Percentage of penalty for extending expiration period Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Value, Issued Preferred stock, authorized 1,000 shares; no shares issued Proceeds from Issuance of Senior Long-term Debt Proceeds from issuance of debt Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Net proceeds from sale of common stock Proceeds from (Payments for) Other Financing Activities Other, net Proceeds from (Repayments of) Commercial Paper Net (payments) proceeds from commercial paper Proceeds from Sale and Maturity of Marketable Securities Proceeds from sale of marketable securities Property, Plant and Equipment, Gross Property and equipment Property, Plant and Equipment, Net Property and equipment, net Property, Plant and Equipment, Net [Abstract] Property and equipment: Range [Axis] Range [Axis] Range [Domain] Range [Domain] Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Amounts reclassified from Accumulated other comprehensive loss Repayments of Debt Repayment with commercial paper Repayments of Long-term Capital Lease Obligations Payments of capital lease obligations Repayments of Long-term Debt Repayment of debt Retained Earnings (Accumulated Deficit) Retained deficit Retained Earnings [Member] Retained Deficit [Member] Revenue, Net Net sales Scenario, Forecast [Member] Scenario Forecast [Member] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Changes in Accumulated Other Comprehensive Loss Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Debt Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table Text Block] Net Periodic Benefit Expense Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Company's Assets and Liabilities Measured at Fair Value on Recurring Basis Finite and indefinite intangible assets schedule. Schedule Of Finite And Indefinite Lived Intangible Assets [Table Text Block] Schedule of Carrying Amounts of Intangible Assets Schedule Of Finite Lived And Indefinite Lived Intangible Assets [Table] Schedule Of Finite Lived And Indefinite Lived Intangible Assets [Table] Schedule Of Finite Lived And Indefinite Lived Intangible Assets [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table Text Block] Segment Results Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Weighted Average for Key Assumptions Used in Determining Fair Value of Options Granted and Related Share-Based Compensation Expense Segments [Domain] Segments [Domain] Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Segment Reporting Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Selling, General and Administrative Expense Operating, selling, general and administrative expenses Operating, selling, general and administrative expenses Senior Notes Long-term debt Senior notes 7.125% senior notes. Senior Notes Eight [Member] 7.125% Senior Notes due August 2018, effective interest rate of 7.28% [Member] 2.875% senior notes. Senior Notes Eleven [Member] 2.875% Senior Notes due January 2023, effective interest rate of 3.21% [Member] 3.250% senior notes. Senior Notes Fifteen [Member] 3.250% Senior Notes due April 2025, effective interest rate 3.36% [Member] 5.75% senior notes. Senior Notes Five [Member] 5.750% Senior Notes due January 2015, effective interest rate of 5.89% [Member] 2.500% senior notes. Senior Notes Fourteen [Member] 2.500% Senior Notes due April 2021, effective interest rate of 2.62% [Member] 4.000% senior notes. Senior Notes Nine [Member] 4.000% Senior Notes due November 2020, effective interest rate of 4.43% [Member] 6.95% senior notes. Senior Notes Seven [Member] 6.950% Senior Notes due June 2016, effective interest rate of 7.09% [Member] 3.125% senior notes. Senior Notes Seventeen [Member] 3.125% Senior Notes due April 2026, effective interest rate of 3.28% [Member] 5.5% senior notes. Senior Notes Six [Member] 5.500% Senior Notes due November 2015, effective interest rate of 4.86% [Member] 1.625% senior notes. Senior Notes Sixteen [Member] 1.625% Senior Notes due April 2019, effective interest rate of 1.77% [Member] 3.700% senior notes. Senior Notes Ten [Member] 3.700% Senior Notes due April 2022, effective interest rate of 3.85% [Member] 1.3% senior notes. Senior Notes Thirteen [Member] 1.300% Senior Notes due January 2017, effective interest rate of 1.43% [Member] 3.125% senior notes. Senior Notes Twelve [Member] 3.125% Senior Notes due July 2023, effective interest rate of 3.26% [Member] Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date Equity plan, expiration date Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Equity plan, expiration period Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend yield This is the estimated percentage of options granted that are expected to be forfeited or cancelled before becoming fully vested. This estimate is based on historical experience at the time of valuation and reduces expenses ratably over the vesting period. An increase in the forfeiture rate will decrease compensation expense. This estimate is evaluated periodically based on the extent to which actual forfeitures differ, or are expected to differ, from the previous estimate. Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Forfeiture Rate Forfeiture rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Weighted average expected lives (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected price volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Stock options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value of options granted Equity Award [Domain] Equity Award [Domain] Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Stock options exercised - Weighted average exercise price Segments [Axis] Segments [Axis] Equity Components [Axis] Equity Components [Axis] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Scenario [Axis] Scenario [Axis] Stockholders' Equity Attributable to Parent Total stockholders' deficit Stockholders' Equity Attributable to Parent [Abstract] Stockholders' deficit: Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock options exercised - Shares Stock Repurchase Program, Authorized Amount Stock repurchase authorized amended value Stock repurchase program. Stock Repurchase Program [Line Items] Stock Repurchase Program [Line Items] Stock Repurchase Program, Remaining Authorized Repurchase Amount Remaining value authorized for share repurchases Stock Repurchase Program [Table] Stock Repurchase Program [Table] Stock Repurchase Program [Table] Subsequent Event [Member] Subsequent Event [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Technology-Based Intangible Assets [Member] Technology [Member] The term prior to the expiration date, required to extend or modify term-loan. Term Loan Maturity Period Term Loan Maturity Period Term Loan [Member] Term Loan [Member] Term Loan [Member] Three sixty four day revolving credit agreement. Three Sixty Four Day Revolving Credit Agreement [Member] 364-Day Revolving Credit Agreement [Member] Trade Names [Member] Trade Name [Member] Trading Symbol Trading Symbol Treasury Stock Acquired, Repurchase Authorization Treasury stock acquired repurchase authorization Treasury Stock, Retired, Cost Method, Amount Retirement of treasury shares Treasury Stock, Shares, Acquired Stock repurchased cumulative, shares Treasury Stock, Shares, Retired Share of treasury stock retired Treasury Stock [Text Block] Stock Repurchase Program Treasury Stock, Value Treasury stock, at cost Treasury Stock, Value, Acquired, Cost Method Repurchased shares of common stock at an aggregate cost Two Thousand Eleven Amended And Restated Equity Incentive Plan [Member] Two Thousand Eleven Amended And Restated Equity Incentive Plan [Member] Amended 2011 Equity Plan [Member] US Government Agencies Debt Securities [Member] Government Bonds [Member] Variable Interests And Equity Method Investments Disclosure [Abstract] Variable Interests And Equity Method Investments Disclosure [Abstract] Variable Interests And Equity Method Investments Disclosure [Abstract] Weighted Average Number Diluted Shares Outstanding Adjustment Effect of dilutive stock equivalents Weighted Average Number of Shares Outstanding, Diluted Weighted average shares for diluted earnings per share Weighted Average Number of Shares Outstanding, Basic Weighted average shares for basic earnings per share