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Equity (Narrative) (Details) $ / shares in Units, $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Apr. 09, 2015 $ / shares | Dec. 27, 2015 USD ($) $ / shares shares | Dec. 28, 2014 USD ($) shares | Sep. 27, 2015 $ / shares shares
Class of Stock [Line Items] |  |  |  |
Par value of common stock | $ / shares |  | $ 0.001 |  | $ 0.001
Authorized shares of common stock |  | 2,400,000,000 |  | 2,400,000,000
Authorized shares of preferred stock |  | 7,500,000 |  |
Outstanding shares of preferred stock |  | 0 |  |
Shares of common stock repurchased |  | 4,500,000 | 5,600,000 |
Total cost of common stock repurchased | $ |  | $ 267.1 | $ 216.1 |
Shares available for repurchase |  | 48,300,000 |  |
Cash dividend declared to shareholders | $ / shares |  | $ 0.20 |  |
Dividends payable, payment date |  | Feb. 19, 2016 |  |
Dividends payable, record date |  | Feb. 04, 2016 |  |
Common Stock [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock split conversion ratio | 2 |  |  |
Par value of common stock | $ / shares | $ 0.001 |  |  |

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