Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 26, 2014	Sep. 27, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Comprehensive Earnings	$ 518	$ 471	$ 1,476	$ 1,488
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance December 27, 2013, Net of Tax			(523)
Other Comprehensive Income
Amounts Reclassified to Net Earnings			58
Tax Expense			(18)
Total Other Comprehensive Income			40
Balance September 26, 2014, Net of Tax	(483)		(483)
Pension and Other Post-Employment Benefits
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance December 27, 2013, Net of Tax			(462)
Other Comprehensive Income
Amounts Reclassified to Net Earnings			46
Tax Expense			(17)
Total Other Comprehensive Income			29
Balance September 26, 2014, Net of Tax	(433)		(433)
Other
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance December 27, 2013, Net of Tax			(61)
Other Comprehensive Income
Amounts Reclassified to Net Earnings			12
Tax Expense			(1)
Total Other Comprehensive Income			11
Balance September 26, 2014, Net of Tax	$ (50)		$ (50)