Income Taxes (Income Tax Expense and Unrecognized Tax Benefits) (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Domestic Contribution to Income before Income Taxes		24.00%	45.00%	39.00%
Unremitted Earnings of Foreign Subsidiaries		$ 20,600,000,000
Income Taxes Paid		943,000,000	861,000,000	1,140,000,000
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate		1,872,300,000	2,283,800,000	1,875,200,000
Income Tax Reconciliation, Deductions, Extraterritorial Income Exclusion		(796,700,000)	(823,300,000)	(741,100,000)
Income Tax Reconciliation, Additions, US Health Care Reform Tax Law		62,900,000	85,100,000	0
Income Tax Reconciliation, Tax Credits		(80,800,000)	(83,200,000)	(79,400,000)
Income Tax Reconciliation, Tax Settlements, Domestic		(85,300,000)	0	(54,400,000)
Income Tax Reconciliation, Other Adjustments		29,400,000	(6,700,000)	28,700,000
Income taxes		1,001,800,000	1,455,700,000	1,029,000,000
Income Tax Expense, Noncash Item, US Health Care Reform Act	85,100,000
Unrecognized Tax Benefits, Beginning Balance	1,351,200,000	1,619,600,000	1,351,200,000	1,223,200,000
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions		89,400,000	186,200,000	179,100,000
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions		390,000,000	117,000,000	170,400,000
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions		(492,300,000)	(30,200,000)	(128,900,000)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations		(2,600,000)	(7,000,000)	(3,300,000)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities		(326,300,000)	(100,000)	(95,000,000)
Unrecognized Tax Benefits, Increases Resulting from the Impact of Foreign Currency Translation		(3,000,000)	2,500,000	5,700,000
Unrecognized Tax Benefits, Ending Balance		1,274,800,000	1,619,600,000	1,351,200,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		812,300,000	1,070,000,000
Tax Adjustments, Settlements, and Unusual Provisions		85,300,000		54,400,000
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority		300,000,000
Income Taxes Paid, Net				50,000,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		(47,300,000)	38,300,000	(1,900,000)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		$ 145,100,000	$ 221,000,000