Income Taxes From Continuing Operations (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Tax Credit Carryforward [Line Items]
Income tax provision	$ 711,500,000	$ 512,500,000	$ 511,400,000
Statutory federal income tax rate	35.00%	35.00%	35.00%
Net discrete tax benefits basis points	0.30%	2.40%	0.60%
Effective income tax rate	23.60%	20.90%	22.90%
Income tax payments	358,000,000	303,000,000	282,000,000
Tax deductions attributable to stock-based compensation	70,000,000	25,000,000	57,000,000
Net operating loss carryforwards	279,000,000
Operating loss carryforwards, valuation allowances	377,000,000
Gross unrecognized tax benefits	613,200,000	518,300,000	517,500,000	439,300,000
Unrecognized tax benefits, net of offsetting indirect tax benefits	534,000,000	451,000,000
Potential interest and penalties	145,000,000	129,000,000
Recognized potential interest and penalties	34,000,000	56,000,000	25,000,000
Estimated reduction in unrecognized tax benefits within twelve months	115,000,000
Cash and equivalents	1,678,700,000	537,000,000	1,633,000,000	1,721,900,000
U.S. Entities
Tax Credit Carryforward [Line Items]
Net deferred tax liabilities	1,300,000,000	1,100,000,000
Non U.S. Entities
Tax Credit Carryforward [Line Items]
Net deferred tax liabilities	33,000,000	13,000,000
Outside The U.S.
Tax Credit Carryforward [Line Items]
Cash and equivalents	1,100,000,000
Investments In Foreign Subsidiaries And Foreign Corporate Joint Ventures That Are Essentially Permanent In Duration
Tax Credit Carryforward [Line Items]
Undistributed Earnings of Foreign Subsidiaries	9,300,000,000	7,800,000,000
General Business And Foreign Tax Credit
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	255,000,000
Tax credit carryforward, valuation allowance	5,000,000
Indirect Impact Of Certain Unrecognized Tax Benefits
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	164,000,000
Attributable To Discontinued Operations
Tax Credit Carryforward [Line Items]
Income tax provision	55,000,000	146,000,000	38,000,000
Income tax payments	$ 55,000,000	$ 129,000,000