Casualty, Environmental and Other Reserves (Details) (USD $) In Millions, unless otherwise specified	Jun. 28, 2013	Dec. 28, 2012
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	$ 150	$ 140
Casualty, environmental and other reserves, Long-term	299	337
Casualty, environmental and other reserves, Total	449	477
Casualty [Member]
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	90	88
Casualty, environmental and other reserves, Long-term	208	237
Casualty, environmental and other reserves, Total	298	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	79	75
Casualty, environmental and other reserves, Long-term	139	158
Casualty, environmental and other reserves, Total	218	233
Occupational [Member]
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	4	5
Casualty, environmental and other reserves, Long-term	23	31
Casualty, environmental and other reserves, Total	27	36
Asbestos [Member]
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	7	8
Casualty, environmental and other reserves, Long-term	46	48
Casualty, environmental and other reserves, Total	53	56
Environmental [Member]
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	42	33
Casualty, environmental and other reserves, Long-term	45	55
Casualty, environmental and other reserves, Total	87	88
Environmental impaired sites	245
Other [Member]
All Contingencies Reserves [Line Items]
Casualty, environmental and other reserves, current	18	19
Casualty, environmental and other reserves, Long-term	46	45
Casualty, environmental and other reserves, Total	$ 64	$ 64