Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 27, 2014	Jun. 28, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Comprehensive Earnings	$ 544	$ 538	$ 958	$ 1,017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance December 27, 2013, Net of Tax			(523)
Other Comprehensive Income
Amounts Reclassified to Net Earnings			44
Tax Expense			(13)
Total Other Comprehensive Income			31
Balance June 27, 2014, Net of Tax	(492)		(492)
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			31
Tax Expense			(12)
Total Other Comprehensive Income			19
Balance June 27, 2014, Net of Tax	(443)		(443)
Other
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance December 27, 2013, Net of Tax			(61)
Other Comprehensive Income
Amounts Reclassified to Net Earnings			13
Tax Expense			(1)
Total Other Comprehensive Income			12
Balance June 27, 2014, Net of Tax	$ (49)		$ (49)