Casualty, Environmental and Other Reserves (Occupational and Asbestos Claims) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 27, 2013 claims	Dec. 28, 2012 claims
Occupational Casualty and Asbestos Issues [Member]
Loss Contingencies [Line Items]
Change in estimate recorded to adjust reserves	$ 0
Loss Contingency, Claims Quantities [Roll Forward]
Open Claims - Beginning of Year	523	746
New Claims Filed	165	160
Claims Settled	(146)	(154)
Claims Dismissed	(150)	(229)
Open Claims - End of Year	392	523
Occupational [Member]
Loss Contingencies [Line Items]
Time period for estimating probable claims (in years)	7 years
Total liability	23	36
Occupational [Member] | Incurred but not reported claims [Member]
Loss Contingencies [Line Items]
Incurred but not reported claims	15	24
Occupational [Member] | Asserted claims [Member]
Loss Contingencies [Line Items]
Asserted claims	8	12
Asbestos [Member]
Loss Contingencies [Line Items]
Total liability	50	56
Asbestos [Member] | Incurred but not reported claims [Member]
Loss Contingencies [Line Items]
Incurred but not reported claims	35	37
Asbestos [Member] | Asserted claims [Member]
Loss Contingencies [Line Items]
Asserted claims	$ 15	$ 19
Carpal Tunnel Claims [Member]
Loss Contingencies [Line Items]
Time period for estimating probable claims (in years)	3 years
Minimum [Member] | Asbestos [Member]
Loss Contingencies [Line Items]
Loss contingency, latency period (in years)	10 years
Maximum [Member] | Asbestos [Member]
Loss Contingencies [Line Items]
Loss contingency, latency period (in years)	40 years