Fair Value Measurements Fair Value of Assets and Liabilities on Recurring And Nonrecurring Basis (Details) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2010	Mar. 31, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Jun. 30, 2011 Reporting Unit One [Member]	Dec. 31, 2009 U.S. CRM Reporting Unit [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2011 Fair Value, Inputs, Level 2 [Member]
Assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Debt Instrument, Decrease, Repayments					$ 1,250,000,000
Asset Impairment Charges				1,908,000,000	709,000,000
Goodwill implied fair value			1,479,000,000	1,448,000,000		1,479,000,000
Intangible assets estimated fair value	14,000,000				14,000,000
Debt Instrument, Fair Value Disclosure	4,579,000,000				4,579,000,000		5,654,000,000
Goodwill, Impairment Loss		697,000,000	(31,000,000)	1,848,000,000	697,000,000	1,817,000,000
Goodwill, Impaired, Adjustment to Initial Estimate Amount	0		(31,000,000)
Intangible asset impairment charges	12,000,000			60,000,000	12,000,000	60,000,000
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Money Market Funds, at Carrying Value										61,000,000	105,000,000	61,000,000	105,000,000
Foreign Currency Contract, Asset, Fair Value Disclosure										58,000,000	82,000,000			58,000,000	82,000,000
Assets, Fair Value Disclosure										119,000,000	187,000,000	61,000,000	105,000,000	58,000,000	82,000,000
Time Deposits, at Carrying Value							16,000,000
Currency Hedge Contracts Liabilities	2,472,000,000				2,472,000,000		2,679,000,000			196,000,000	189,000,000			196,000,000	189,000,000
Accrued Contingent Consideration										371,000,000	71,000,000					371,000,000	71,000,000
Liabilities, Fair Value Disclosure										567,000,000	260,000,000			196,000,000	189,000,000	371,000,000	71,000,000
Cash	93,000,000				93,000,000		92,000,000
Recurring fair value measurements [Roll Forward]
Fair Value Of Recurring Fair Value Measurements Amount, starting balance		(71,000,000)			(71,000,000)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Contingent consideration liability recorded					(287,000,000)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability adjustment					(13,000,000)
Fair Value Of Recurring Fair Value Measurements Amount, ending balance	(371,000,000)				(371,000,000)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Abstract]
Cost-method Investments, Aggregate Carrying Amount	16,000,000				16,000,000		43,000,000
Carrying value of goodwill prior to impairment							1,479,000,000		3,296,000,000
Allocated Goodwill								$ 782,000,000