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Debt - Credit Facilities (Details) (USD $)
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12 Months Ended | |
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Dec. 28, 2013
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Sep. 11, 2012
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| Line of Credit Facility [Line Items] | ||
| Weighted average interest rate on borrowings under credit lines at period end (in hundredths) | 2.73% | |
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Revolving credit facility [Member]
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| Line of Credit Facility [Line Items] | ||
| Revolving credit facility borrowing capacity | $ 500,000,000 | $ 400,000,000 |
| Additional credit available under expansion feature of revolving credit facility | 200,000,000 | 100,000,000 |
| Revolving credit facility expiration date | Sep. 12, 2017 | |
| Outstanding letters of credit provided to third parties | 10,100,000 | |
| Line of credit facility, amount outstanding | 0 | |
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Various other short-term bank credit lines [Member]
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| Line of Credit Facility [Line Items] | ||
| Line of credit facility, amount outstanding | $ 29,500,000 |