Casualty, Environmental and Other Reserves (Details) (USD $) In Millions, unless otherwise specified	Sep. 27, 2013 claims	Dec. 28, 2012
Casualty [Member]
All Contingencies Reserves [Line Items]
Loss Contingency, Accrual, Current (Note 4)	$ 90	$ 88
Loss Contingency, Accrual, Noncurrent (Note 4)	189	237
Loss Contingency, Accrual, Total	279	325
Self-insured retention amount, per occurrence	50
Number of Claims Expected to Exceed Self Insured Retention Amount	0
Personal Injury [Member]
All Contingencies Reserves [Line Items]
Loss Contingency, Accrual, Current (Note 4)	79	75
Loss Contingency, Accrual, Noncurrent (Note 4)	122	158
Loss Contingency, Accrual, Total	201	233
Occupational [Member]
All Contingencies Reserves [Line Items]
Loss Contingency, Accrual, Current (Note 4)	4	5
Loss Contingency, Accrual, Noncurrent (Note 4)	23	31
Loss Contingency, Accrual, Total	27	36
Asbestos [Member]
All Contingencies Reserves [Line Items]
Loss Contingency, Accrual, Current (Note 4)	7	8
Loss Contingency, Accrual, Noncurrent (Note 4)	44	48
Loss Contingency, Accrual, Total	51	56
Environmental [Member]
All Contingencies Reserves [Line Items]
Loss Contingency, Accrual, Current (Note 4)	41	33
Loss Contingency, Accrual, Noncurrent (Note 4)	47	55
Loss Contingency, Accrual, Total	88	88
Environmental impaired sites	242
Other [Member]
All Contingencies Reserves [Line Items]
Loss Contingency, Accrual, Current (Note 4)	18	19
Loss Contingency, Accrual, Noncurrent (Note 4)	48	45
Loss Contingency, Accrual, Total	66	64
Casualty, Environmental and Other [Member]
All Contingencies Reserves [Line Items]
Loss Contingency, Accrual, Current (Note 4)	149	140
Loss Contingency, Accrual, Noncurrent (Note 4)	284	337
Loss Contingency, Accrual, Total	$ 433	$ 477