Casualty, Environmental and Other Reserves (Details) (USD $) In Millions, unless otherwise specified	Mar. 29, 2013	Dec. 28, 2012
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	$ 139	$ 140
Casualty, environmental and other reserves, Long-term	323	337
Casualty, environmental and other reserves, Total	462	477
Casualty [Member]
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	88	88
Casualty, environmental and other reserves, Long-term	223	237
Casualty, environmental and other reserves, Total	311	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]
Casualty, environmental and other reserves, current	75	75
Casualty, environmental and other reserves, Long-term	152	158
Casualty, environmental and other reserves, Total	227	233
Occupational [Member]
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	5	5
Casualty, environmental and other reserves, Long-term	23	31
Casualty, environmental and other reserves, Total	28	36
Asbestos [Member]
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	8	8
Casualty, environmental and other reserves, Long-term	48	48
Casualty, environmental and other reserves, Total	56	56
Environmental [Member]
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	33	33
Casualty, environmental and other reserves, Long-term	56	55
Casualty, environmental and other reserves, Total	89	88
Environmental impaired sites	250
Other [Member]
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	18	19
Casualty, environmental and other reserves, Long-term	44	45
Casualty, environmental and other reserves, Total	$ 62	$ 64