Employee Benefit Plans - fair values of pension plan assets (Details) (USD $)
In Thousands, unless otherwise specified |
Nov. 24, 2013
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Total [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | $ 903,033 | |||||||||||||
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 1,132 | |||||||||||||
Significant Observable Inputs (Level 2) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 898,860 | |||||||||||||
Significant Unobservable Inputs (Level 3) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 3,041 | |||||||||||||
Cash and cash equivalents [Member] | Total [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 1,132 | |||||||||||||
Cash and cash equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 1,132 | |||||||||||||
Cash and cash equivalents [Member] | Significant Observable Inputs (Level 2) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | |||||||||||||
Cash and cash equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | |||||||||||||
U.S. large cap [Member] | Total [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 175,181 | [1] | ||||||||||||
U.S. large cap [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [1] | ||||||||||||
U.S. large cap [Member] | Significant Observable Inputs (Level 2) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 175,181 | [1] | ||||||||||||
U.S. large cap [Member] | Significant Unobservable Inputs (Level 3) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [1] | ||||||||||||
U.S. small cap [Member] | Total [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 31,163 | [1] | ||||||||||||
U.S. small cap [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [1] | ||||||||||||
U.S. small cap [Member] | Significant Observable Inputs (Level 2) [Member]
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||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 31,163 | [1] | ||||||||||||
U.S. small cap [Member] | Significant Unobservable Inputs (Level 3) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [1] | ||||||||||||
International [Member] | Total [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 133,339 | [1] | ||||||||||||
International [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [1] | ||||||||||||
International [Member] | Significant Observable Inputs (Level 2) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 133,339 | [1] | ||||||||||||
International [Member] | Significant Unobservable Inputs (Level 3) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [1] | ||||||||||||
Fixed income securities [Member] | Total [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 490,701 | [2] | ||||||||||||
Fixed income securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [2] | ||||||||||||
Fixed income securities [Member] | Significant Observable Inputs (Level 2) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 490,701 | [2] | ||||||||||||
Fixed income securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [2] | ||||||||||||
Real estate [Member] | Total [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 55,082 | [3] | ||||||||||||
Real estate [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [3] | ||||||||||||
Real estate [Member] | Significant Observable Inputs (Level 2) [Member]
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||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 55,082 | [3] | ||||||||||||
Real estate [Member] | Significant Unobservable Inputs (Level 3) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [3] | ||||||||||||
Private equity [Member] | Total [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 3,041 | [4] | ||||||||||||
Private equity [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
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||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [4] | ||||||||||||
Private equity [Member] | Significant Observable Inputs (Level 2) [Member]
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||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [4] | ||||||||||||
Private equity [Member] | Significant Unobservable Inputs (Level 3) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 3,041 | [4] | ||||||||||||
Hedge funds [Member] | Total [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 7,090 | [5] | ||||||||||||
Hedge funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [5] | ||||||||||||
Hedge funds [Member] | Significant Observable Inputs (Level 2) [Member]
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||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 7,090 | [5] | ||||||||||||
Hedge funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [5] | ||||||||||||
Other [Member] | Total [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 6,304 | [6] | ||||||||||||
Other [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
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||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 0 | [6] | ||||||||||||
Other [Member] | Significant Observable Inputs (Level 2) [Member]
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||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | 6,304 | [6] | ||||||||||||
Other [Member] | Significant Unobservable Inputs (Level 3) [Member]
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||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||
Fair value of plan assets | $ 0 | [6] | ||||||||||||
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