Income Taxes (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Tax benefits from stock-based compensation recorded in additional paid-in-capital		$ 285,000,000
Tax benefit for excess foreign tax credits	265,000,000		265,000,000
Foreign earnings repatriated	1,100,000,000
Content of unremitted foreign earnings			70.00%
Multi year international capital investment plan to be spent next year		1,100,000,000
Additional capacity of investment		800,000,000
Period to recognize U.S. deferred tax assets associated with federal net operating loss carry forwards, in years		14
Accumulated foreign unremitted earnings		10,800,000,000	8,900,000,000
Unrecognized tax benefits that would impact our effective tax rate		15,000,000	18,000,000
U.S. statutes of limitations minimum, years		3
U.S. statues of limitations maximum, years		5
Foreign statues of limitations minimum, years		3
Foreign statues of limitations maximum, years		7
U.S. profits required to realize deferred tax assets		7,800,000,000
Future U.S. profit required realizing deferred tax assets		4,200,000,000
Percentage of U.S. subsidiaries join in the filing of consolidated U.S. federal income tax returns		80.00%
Maximum [Member]
Income Taxes [Line Items]
Multi-year international capital investment plan		2,700,000,000
Minimum [Member]
Income Taxes [Line Items]
Multi-year international capital investment plan		2,400,000,000
United States And Foreign Deferred Tax Assets [Member]
Income Taxes [Line Items]
Deferred tax assets with remaining valuation allowances		$ 219,000,000	$ 214,000,000
Valuation Allowance [Member]
Income Taxes [Line Items]
Probability percentage		50.00%