Netting Arrangements Narratives (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Securities Sold under Agreements to Repurchase [Abstract]
Securities sold under agreements to repurchase	$ 50,000,000	$ 0
Derivative assets not subject to an enforceable master netting arrangement or similar agreement	28,000,000	1,700,000,000
Derivative liabilities not subject to an enforceable master netting arrangement or similar agreement	1,000,000	1,100,000,000
Cash and cash equivalents [Member]
Securities Sold under Agreements to Repurchase [Abstract]
Securities purchased under agreements to resell or similar arrangements	16,600,000,000	11,600,000,000
Securities purchased under agreements to resell or similar arrangements [Member]
Securities Received as Collateral [Abstract]
Fair value of non-cash collateral accepted	47,600,000,000	50,700,000,000
Fair value of non-cash collateral accepted that could be sold or repledged	41,900,000,000	39,800,000,000
Fair value of securities accepted as collateral that have been sold or repledged	0	0
OTC risk management derivatives [Member]
Securities Received as Collateral [Abstract]
Fair value of non-cash collateral accepted	$ 51,000,000	$ 24,000,000

Fair value of 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, not subject to a master netting arrangement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 55

-Paragraph 22

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Fair value of 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, not subject to a master netting arrangement.

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Fair value of collateral permitted, by contact or custom, to be sold or re-pledged.

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Fair value of the collateral, or portion thereof, that has been re-pledged, delivered, or otherwise used.

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- Definition

Amount, after the effects of master netting arrangements, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes purchases of participations in pools of securities that are subject to a resale agreement, assets 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

-Name Accounting Standards Codification

-Topic 942

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.3)

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The carrying value as of the balance sheet date of the assets received as collateral against securities loaned to other broker-dealers. Borrowers of securities generally are required to provide collateral to the lenders of securities, commonly cash but sometimes other securities or standby letters of credit, with a value slightly higher than that of the securities borrowed. In instances where the entity is permitted to sell or re-pledge these securities, the entity reports the fair value of the collateral received and the related obligation to return the collateral as a liability.

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Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. 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

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.13(1))

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