Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Machinery And Equipment [Member]	Dec. 31, 2011 Buildings [Member]	Dec. 31, 2011 Plant And Equipment [Member]	Dec. 31, 2010 Plant And Equipment [Member]	Dec. 31, 2009 Plant And Equipment [Member]	Dec. 31, 2008 Cumulative Effect Of A Change In Accounting Principle [Member]	Dec. 31, 2010 U.S. Treasury Securities [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated life minimum (years)				5	10
Property, plant and equipment, estimated life maximum (years)				15	40
Depreciation						$ 712,000,000	$ 749,000,000	$ 750,000,000
Capitalized internal-use software useful life minimum (years)	2
Capitalized internal-use software useful life maximum (years)	6
Capitalized internal-use software, net	864,000,000	899,000,000
Capitalized internal-use software accumulated amortization	1,300,000,000	1,100,000,000
Capitalized internal-use software amortization	211,000,000	211,000,000	160,000,000
Cash payments for internal-use software	173,000,000	254,000,000	314,000,000
Expected percentage of net sales that will be recognized using percentage-of-completion method	95.00%
Reduction in retained earnings due to cumulative effect of change in accounting principle		211,000,000							112,000,000
Independent research and development costs charged to cost of sales	585,000,000	639,000,000	717,000,000
Net gains (losses) on marketable securities	40,000,000	56,000,000	110,000,000
Profit booking rate adjustments net	1,600,000,000	1,400,000,000	1,600,000,000
Increase in net earnings due to change in estimates	1,000,000,000	890,000,000	1,000,000,000
Increase in net earnings per share due to change in estimates	$ 3.00	$ 2.40	$ 2.60
Fair value of trading securities	781,000,000	843,000,000								500,000,000
Net unrealized gains (losses) on trading securities	(24,000,000)	24,000,000	115,000,000
Ownership interest percentage needed for significant influence, minimum	20.00%
Ownership interest percentage needed for significant influence, maximum	50.00%
Aggregate notional amount of outstanding foreign currency exchange contracts	1,700,000,000	2,200,000,000
Net earnings from equity investments	332,000,000	312,000,000	278,000,000
Total equity method investment	697,000,000	671,000,000
Outstanding interest rate swap contracts	$ 450,000,000