Shareholders' Equity - Reclassifications Out of AOCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013		Jul. 01, 2012
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Operating costs and expenses	$ (6,951)	$ (6,952)	$ (13,508)		$ (13,671)
Tax benefit (expense)	(303)	(294)	(556)		(551)
Net earnings	640	634	1,211		1,198
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net earnings			122
Reclassification out of Accumulated Other Comprehensive Income | Losses on cash flow hedges of foreign exchange
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Operating costs and expenses			(12)
Tax benefit (expense)			4
Net earnings			(8)
Reclassification out of Accumulated Other Comprehensive Income | Changes in Retirement Plans’ Funded Status
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Recognized net actuarial loss			224	[1]
Amortization of prior service credit			(26)	[1]
Tax benefit (expense)			(68)
Net earnings			$ 130

[1] These AOCL components are included in our net periodic pension and other post-retirement benefit cost. See Note M for additional details.