Objectives And Strategies For Using Derivatives (Narratives) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedge ineffectiveness assertion	Fair value hedges resulted in no significant ineffectiveness in the three months ended March 31, 2015 and 2014
Gain (loss) recognized in earnings as a result of hedge not qualifying as a fair value hedge	$ 0	$ 0
Cash flow hedge ineffectiveness assertion	Cash flow hedges resulted in no significant ineffectiveness for the three months ended March 31, 2015 and 2014
Gain (loss) reclassified into earnings as a result of discontinuance of cash flow hedges	0	0
After-tax gains expected to be reclassified from AOCI	30,000,000
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional values of outstanding derivatives	2,400,000,000
Gain (loss) on undesignated foreign exchange hedging instruments	(155,000,000)	13,000,000
Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional values of outstanding derivatives	138,000,000
Fair Value Hedging [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional values of outstanding derivatives	250,000,000
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Maximum maturity of cash flow hedges outstanding	Dec. 01, 2017
Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional values of outstanding derivatives	200,000,000
Cash Flow Hedging [Member] | Foreign currency exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional values of outstanding derivatives	$ 810,000,000