Offsetting Arrangements (Liabilities With Enforceable Netting Arrangements) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Offsetting [Abstract]
Derivative, Net Amount of Liabilities Presented in Statement of Condition	$ 4,312	[1]	$ 6,259
Derivative, Counterparty Netting	0	[2]	0	[2]
Derivative, Collateral Provided	0	[2]	(6)	[2]
Derivative, Net Amount	4,312	[3]	6,253	[3]
Repurchase Agreements and Securities Lending, Net Amount of Liabilities Presented in Statement of Condition	15,238	[4]	14,573	[4]
Repurchase Agreements and Securities Lending, Counterparty Netting	(113)	[2]	(131)	[2]
Repurchase Agreements and Securities Lending, Collateral Provided	(13,015)	[2]	(13,036)	[2]
Repurchase Agreements and Securities Lending, Net Amount	2,110	[3]	1,406	[3]
Total, Net Amount of Liabilities Presented in Statement of Condition	19,550		20,832
Total, Counterparty Netting	(113)	[2]	(131)	[2]
Total, Collateral Provided	(13,015)	[2]	(13,042)	[2]
Total, Net Amount	$ 6,422	[3]	$ 7,659	[3]

[1] Amounts include all transactions regardless of whether or not they are subject to an enforceable netting arrangement.

[2] Amounts subject to netting arrangements which have been determined to be legally enforceable

[3] Includes amounts secured by collateral not determined to be subject to enforceable netting arrangements.

[4] Included in the $15,238 million as of March 31, 2014 was $8,953 million of repurchase agreements and $6,285 million of collateral received related to securities lending. Included in the $14,573 million as of December 31, 2013 was $7,953 million of repurchase agreements and $6,620 million of collateral received related to securities lending. Repurchase agreements and collateral received related to securities lending were recorded in securities sold under repurchase agreements and accrued expenses and other liabilities, respectively, in our consolidated statement of condition. Refer to note 7 for additional information with respect to principal securities finance transactions.