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Casualty, Environmental and Other Reserves (Details) (USD $)
Sep. 26, 2014
Dec. 27, 2013
All Contingencies Reserves [Line Items]    
Loss Contingency, Accrual, Current $ 151,000,000 $ 151,000,000
Loss Contingency, Accrual, Long-term 281,000,000 300,000,000
Casualty [Member]
    
All Contingencies Reserves [Line Items]    
Loss Contingency, Accrual, Current 76,000,000 72,000,000
Loss Contingency, Accrual, Long-term 187,000,000 208,000,000
Loss Contingency, Accrual, Total 263,000,000 280,000,000
Self-insured retention amount, per occurrence 50,000,000  
Number of individual claims expected to exceed self insured retention amount 0  
Personal Injury [Member]
    
All Contingencies Reserves [Line Items]    
Loss Contingency, Accrual, Current 63,000,000 59,000,000
Loss Contingency, Accrual, Long-term 135,000,000 148,000,000
Loss Contingency, Accrual, Total 198,000,000 207,000,000
Occupational [Member]
    
All Contingencies Reserves [Line Items]    
Loss Contingency, Accrual, Current 3,000,000 3,000,000
Loss Contingency, Accrual, Long-term 15,000,000 20,000,000
Loss Contingency, Accrual, Total 18,000,000 23,000,000
Asbestos [Member]
    
All Contingencies Reserves [Line Items]    
Loss Contingency, Accrual, Current 10,000,000 10,000,000
Loss Contingency, Accrual, Long-term 37,000,000 40,000,000
Loss Contingency, Accrual, Total 47,000,000 50,000,000
Environmental [Member]
    
All Contingencies Reserves [Line Items]    
Loss Contingency, Accrual, Current 59,000,000 59,000,000
Loss Contingency, Accrual, Long-term 48,000,000 41,000,000
Loss Contingency, Accrual, Total 107,000,000 100,000,000
Environmental impaired sites 252  
Other [Member]
    
All Contingencies Reserves [Line Items]    
Loss Contingency, Accrual, Current 16,000,000 20,000,000
Loss Contingency, Accrual, Long-term 46,000,000 51,000,000
Loss Contingency, Accrual, Total 62,000,000 71,000,000
Casualty, Environmental and Other [Member]
    
All Contingencies Reserves [Line Items]    
Loss Contingency, Accrual, Current 151,000,000 151,000,000
Loss Contingency, Accrual, Long-term 281,000,000 300,000,000
Loss Contingency, Accrual, Total $ 432,000,000 $ 451,000,000