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Debt (Senior Notes) (Details) (USD $) | 0 Months Ended | 3 Months Ended | 9 Months Ended | 0 Months Ended |  | 0 Months Ended | 9 Months Ended |  |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 25, 2013 | Sep. 27, 2014 | Sep. 28, 2013 | Sep. 27, 2014 | Sep. 28, 2013 | Jan. 31, 2013 3.85% Senior Notes Due February 1,2023 [Member] | Sep. 27, 2014 3.85% Senior Notes Due February 1,2023 [Member] | Aug. 15, 2014 6.125% Notes, Payable January 15, 2016 [Member] | Jan. 17, 2006 6.125% Notes, Payable January 15, 2016 [Member] | Sep. 28, 2013 6.125% Notes, Payable January 15, 2016 [Member] | Sep. 27, 2014 6.125% Notes, Payable January 15, 2016 [Member] | Aug. 15, 2014 6.125% Notes, Payable January 15, 2016 [Member] | Sep. 27, 2014 6.125% Notes, Payable January 15, 2016 [Member] Interest Expense [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debts |  |  |  |  |  | $ 600,000,000 |  |  | $ 900,000,000 |  |  |  |
Interest rate percentage |  |  |  |  |  | 3.85% | 3.85% |  | 6.125% |  | 6.125% |  |
Payment of financing costs | 1,836,000 |  |  |  |  | 6,000,000 |  |  |  |  |  |  |
Senior notes due date |  |  |  |  |  |  |  |  | Jan. 15, 2016 |  |  |  |
Increase in interest rate from rating agency downgrade |  |  |  |  |  |  |  |  |  | 0.25% |  |  |
Maximum increase in interest rate per agency from rating agency downgrade |  |  |  |  |  |  |  |  |  | 1.00% |  |  |
Increase in interest expense per quarter for .25% increase in notes per $100,000 of outstanding notes |  | 34,786,000 | 25,630,000 | 77,584,000 | 70,098,000 |  |  |  |  | 63,000 |  |  |
Incremental increase in outstanding notes |  |  |  |  |  |  |  |  | 100,000,000 |  |  |  |
Amount of debt repurchased |  |  |  |  |  |  |  |  |  |  |  | 200,000,000 |
Price as a percentage of the principal amount debt repurchased |  |  |  |  |  |  |  | 107.73% |  |  |  |  |
Premium to tendering noteholders |  |  |  |  |  |  |  |  |  |  |  |  | 15,450,000
Fees associated with cash tender |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,080,000

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