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Pension and Other Postretirement Benefit Plans 2 (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 29, 2013
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Jun. 07, 2013
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Apr. 28, 2013
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Apr. 29, 2012
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Pension Plan, Defined Benefit [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Other non-current assets | $ 502,143 | $ 362,832 | $ 287,467 | $ 399,868 |
| Other accrued liabilities | (3,309) | (73,593) | (32,271) | (15,943) |
| Other non-current liabilities | (69,537) | (107,104) | (147,619) | (173,438) |
| Net asset/(liabilities) recognized | 429,297 | 182,135 | 107,577 | 210,487 |
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Other Postretirement Benefit Plans, Defined Benefit [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Other non-current assets | 0 | 0 | 0 | 0 |
| Other accrued liabilities | (14,625) | (15,679) | (16,998) | (17,565) |
| Other non-current liabilities | (193,554) | (234,954) | (240,319) | (231,452) |
| Net asset/(liabilities) recognized | $ (208,179) | $ (250,633) | $ (257,317) | $ (249,017) |