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Equity (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended | 0 Months Ended |
--- | --- | --- | --- | ---
Mar. 29, 2015 | Mar. 29, 2015 | Mar. 30, 2014 | Apr. 09, 2015 | Sep. 28, 2014
Class of Stock [Line Items] |  |  |  |  |
Par value of common stock | $ 0.001us-gaap_CommonStockParOrStatedValuePerShare | $ 0.001us-gaap_CommonStockParOrStatedValuePerShare |  |  | $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Authorized shares of common stock | 2,400.0us-gaap_CommonStockSharesAuthorized | 2,400.0us-gaap_CommonStockSharesAuthorized |  |  | 2,400.0us-gaap_CommonStockSharesAuthorized
Authorized shares of preferred stock | 7.5us-gaap_PreferredStockSharesAuthorized | 7.5us-gaap_PreferredStockSharesAuthorized |  |  |
Outstanding shares of preferred stock | 0us-gaap_PreferredStockSharesOutstanding | 0us-gaap_PreferredStockSharesOutstanding |  |  |
Shares of common stock repurchased |  | 8.6us-gaap_StockRepurchasedDuringPeriodShares | 8.1us-gaap_StockRepurchasedDuringPeriodShares |  |
Total cost of common stock repurchased |  | $ 342.4us-gaap_StockRepurchasedDuringPeriodValue | $ 301.2us-gaap_StockRepurchasedDuringPeriodValue |  |
Shares available for repurchase | 23.1us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased | 23.1us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased |  |  |
Cash dividend declared to shareholders | $ 0.16us-gaap_DividendsPayableAmountPerShare | $ 0.16us-gaap_DividendsPayableAmountPerShare |  |  |
Dividends payable, payment date | May 22, 2015 |  |  |  |
Dividends payable, record date | May 07, 2015 |  |  |  |
Subsequent Event [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Stock split conversion ratio |  |  |  | 2us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Par value of common stock |  |  |  | $ 0.001us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |

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