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Equity (Details) (USD $) | 12 Months Ended |  | 3 Months Ended
--- | --- | --- | ---
Dec. 29, 2012 | Dec. 31, 2011 | Sep. 29, 2012 Leucadia [Member]
Equity, Class of Treasury Stock [Line Items] |  |  |
Cumulative foreign currency translation adjustment | $ (3,032,000) | $ (10,396,000) |
Unrecognized prior service cost, net of income tax | (13,000) | (13,000) |
Unrecognized actuarial net loss, net of income tax | (39,514,000) | (38,667,000) |
Unrecognized derivative gains, net of income tax | (167,000) | (422,000) |
Unrealized gain on marketable securities, net of income tax | 103,000 | 89,000 |
Accumulated other comprehensive loss | (42,623,000) | (49,409,000) |
Authorization to repurchase shares of common stock (in shares) | 10,000,000 |  |
Shares repurchased (in shares) | 2,400,000 |  | 10,400,000
Total cost of stock repurchased |  |  | $ 427,300,000
Increase in Mexican peso value relative to US dollar (in hundredths) | 7.60% |  |
Increase in British Pound value relative to US dollar (in hundredths) | 3.90% |  |

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