Derivatives and Hedging Activities (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Total fair value of derivatives assets	$ 230	$ 765
Total fair value of derivatives liabilties	412	280
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Cash collateral netting	30	54
Derivative asset and liability netting	(94)	(157)
Total derivative assets, net	106	555
Other Assets [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivatives assets	110	458
Other Assets [Member] \| Interest Rate Contract [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivatives assets	57	111
Other Assets [Member] \| Foreign exchange contracts [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivatives assets	53	347
Other Assets [Member] \| Foreign exchange contracts [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivatives assets	120	308
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Cash collateral netting	0	(68)
Derivative asset and liability netting	(94)	(157)
Total derivative liabilities, net	318	55
Other Liabilities [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivatives liabilties	196	104
Other Liabilities [Member] \| Foreign exchange contracts [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total fair value of derivatives liabilties	216	176
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 derivatives liabilties	0	69
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 derivatives liabilties	196	35
Individually Significant Counterparties [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets, net	0	0
Total derivative liabilities, net	$ 0	$ 0

Represents the netting of cash collateral received and posted under credit support agreements.

No definition available.

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- Definition

Represents the netting of derivative assets and liabilities under master netting agreements.

+ 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

No definition available.

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- Definition

Fair value, before effects of master netting arrangements, of a financial liability 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

No definition available.

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- Definition

Fair value, after the 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 not subject to a master netting arrangement and not elected to be offset.

+ References

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or 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 liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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