Derivatives and Hedging Activities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets	$ 544	$ 991
Total fair value of derivative liabilities	201	164
Total derivatives assets, net	282	711
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets	544	991
Cash collateral netting	(155)	(158)
Derivative asset and liability netting	(107)	(122)
Total derivatives assets, net	282	711
Other Assets [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets	427	806
Other Assets [Member] \| Foreign exchange contracts [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets	117	185
Other Assets [Member] \| Fair Value Hedging [Member] \| Interest Rate Contract [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets	236	314
Other Assets [Member] \| Fair Value Hedging [Member] \| Total Return Swap [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets	0	0
Other Assets [Member] \| Net Investment Hedging [Member] \| Foreign exchange contracts [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets	191	492
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative liabilities	201	164
Cash collateral netting	0	(4)
Derivative asset and liability netting	(107)	(122)
Total derivatives liabilities, net	94	38
Other Liabilities [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative liabilities	66	50
Other Liabilities [Member] \| Foreign exchange contracts [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative liabilities	135	114
Other Liabilities [Member] \| Fair Value Hedging [Member] \| Interest Rate Contract [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative liabilities	9	4
Other Liabilities [Member] \| Fair Value Hedging [Member] \| Total Return Swap [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative liabilities	0	0
Other Liabilities [Member] \| Net Investment Hedging [Member] \| Foreign exchange contracts [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivative liabilities	$ 57	$ 46

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+ References

No definition available.

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- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Includes assets not subject to a master netting arrangement.

+ References

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No definition available.

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+ References

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+ References

No definition available.

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