Offsetting Arrangements Liabilities With Enforceable Netting Arrangements (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Offsetting [Abstract]
Net Amount of Liabilities Presented in Statement of Condition	$ 183	[1]	$ 328	[1]
Financial Instruments	0		0
Cash Collateral Provided	0		0
Net Amount	183		328
Net Amount of Liabilities Presented in Statement of Condition	18,643	[2],[3]	12,992	[2],[3]
Financial Instruments	202	[3]	126	[3]
Cash Collateral Provided	0	[3]	0	[3]
Net Amount	18,441	[3]	12,866	[3]
Net Amount of Liabilities Presented in Statement of Condition	18,826		13,320
Financial Instruments	202		126
Cash Collateral Provided	0		0
Net Amount	$ 18,624		$ 13,194

[1] In addition to the $183 million and $328 million as of March 31, 2013 and December 31, 2012, respectively, we have $5,187 million and $5,039 million, respectively, of derivative liabilities not determined to be subject to enforceable netting arrangements. Refer to notes 2 and 10 for additional information with respect to derivative financial instrument balances recorded in our consolidated statement of condition.

[2] Included in the $18,643 million as of March 31, 2013 was $11,538 million of repurchase agreements and $7,105 million of securities lending. Included in the $12,992 million as of December 31, 2012 was $8,006 million of repurchase agreements and $4,986 million of securities lending. Repurchase agreements and securities lending were recorded in securities sold under repurchase agreements and other liabilities, respectively, in our consolidated statement of condition. Refer to note 7 for additional information with respect to these arrangements.

[3] Excludes the impact of non-cash collateral. These secured financing transactions are fully collateralized.