Netting Arrangements Netting Arrangements Table (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
Assets
Derivative assets, gross amount	$ 8,133,000,000		$ 8,756,000,000
Derivative assets, gross amount offset	(6,897,000,000)	[1]	(8,422,000,000)	[1]
Derivative assets, net amount presented in the condensed consolidated balance sheets	1,236,000,000	[2]	334,000,000	[2]
Derivative assets, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, financial instruments	(145,000,000)	[3]	(83,000,000)	[3]
Derivative assets, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, collateral	(16,000,000)	[4]	(20,000,000)	[4]
Derivative assets, net amount	1,075,000,000		231,000,000
Securities purchased under agreements to resell or similar arrangements, gross amount	32,250,000,000	[5]	50,565,000,000	[5]
Securities purchased under agreements to resell or similar arrangements, gross amount offset	0	[1],[5]	0	[1],[5]
Securities purchased under agreements to resell or similar arrangements, net amount presented in the condensed consolidated balance sheets	32,250,000,000	[5]	50,565,000,000	[5]
Securities purchased under agreements to resell, under master netting arrangement, amounts not offset in the condensed consolidated balance sheets, financial instruments	0	[3],[5]	0	[3],[5]
Securities purchased under agreements to resell or similar arrangements, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, collateral	(32,249,000,000)	[4],[5]	(50,565,000,000)	[4],[5]
Securities purchased under agreements to resell or similar arrangements, net amount	1,000,000	[5]	0	[5]
Total assets, gross amount	40,383,000,000		59,321,000,000
Total assets, gross amount offset	(6,897,000,000)	[1]	(8,422,000,000)	[1]
Total assets, net amount presented in the condensed consolidated balance sheets	33,486,000,000		50,899,000,000
Total assets, under master netting arrangements, not offset in the condensed consolidated balance sheets, financial instruments	(145,000,000)	[3]	(83,000,000)	[3]
Total assets, under master netting arrangements, not offset in the condensed consolidated balance sheets, collateral	(32,265,000,000)	[4]	(50,585,000,000)	[4]
Total assets, net amount	1,076,000,000		231,000,000
Derivative assets not subject to an enforceable master netting arrangement or similar agreement	28,000,000		1,700,000,000
Liabilities:
Total liabilities, gross amount	(10,125,000,000)		(9,717,000,000)
Total liabilities, gross amount offset	9,390,000,000	[1]	9,370,000,000	[1]
Total liabilities, net amount presented in the condensed consolidated balance sheets	(735,000,000)	[2]	(347,000,000)	[2]
Total liabilities, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, financial instruments	145,000,000	[3]	83,000,000	[3]
Total liabilities, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, collateral	0	[4]	0	[4]
Total liabilities, net amount	(590,000,000)		(264,000,000)
Derivative liabilities not subject to an enforceable master netting arrangement or similar agreement	1,000,000		1,100,000,000
Risk Management Derivatives [Member]
Assets
Derivative assets, gross amount offset	(6,897,000,000)	[6]	(8,422,000,000)	[6]
Liabilities:
Derivative liabilities, gross amount offset	9,390,000,000	[6]	9,370,000,000	[6]
Mortgage related commitment derivatives [Member]
Assets
Derivative assets, gross amount	389,000,000		265,000,000
Derivative assets, gross amount offset	0	[1]	0	[1]
Derivative assets, net amount presented in the condensed consolidated balance sheets	389,000,000		265,000,000
Derivative assets, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, financial instruments	(145,000,000)	[3]	(83,000,000)	[3]
Derivative assets, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, collateral	(4,000,000)	[4]	0	[4]
Derivative assets, net amount	240,000,000		182,000,000
Liabilities:
Derivative liabilities, gross amount	(525,000,000)		(214,000,000)
Derivative liabilities, gross amount offset	0	[1]	0	[1]
Derivative liabilities, net amount presented in the condensed consolidated balance sheets	(525,000,000)		(214,000,000)
Derivative liabilities, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, financial instruments	145,000,000	[3]	83,000,000	[3]
Derivative liabilities, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, collateral	0	[4]	0	[4]
Derivative liabilities, net amount	(380,000,000)		(131,000,000)
OTC Risk Management Derivatives [Member] | Risk Management Derivatives [Member]
Assets
Derivative assets, gross amount	6,795,000,000		8,491,000,000
Derivative assets, gross amount offset	(6,777,000,000)	[1]	(8,422,000,000)	[1]
Derivative assets, net amount presented in the condensed consolidated balance sheets	18,000,000		69,000,000
Derivative assets, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, financial instruments	0	[3]	0	[3]
Derivative assets, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, collateral	(12,000,000)	[4]	(20,000,000)	[4]
Derivative assets, net amount	6,000,000		49,000,000
Liabilities:
Derivative liabilities, gross amount	(8,352,000,000)		(9,503,000,000)
Derivative liabilities, gross amount offset	8,142,000,000	[1]	9,370,000,000	[1]
Derivative liabilities, net amount presented in the condensed consolidated balance sheets	(210,000,000)		(133,000,000)
Derivative liabilities, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, financial instruments	0	[3]	0	[3]
Derivative liabilities, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, collateral	0	[4]	0	[4]
Derivative liabilities, net amount	(210,000,000)		(133,000,000)
OTC-Cleared Risk Management Derivatives [Member] | Risk Management Derivatives [Member]
Assets
Derivative assets, gross amount	949,000,000	[7]
Derivative assets, gross amount offset	(120,000,000)	[1],[7]
Derivative assets, net amount presented in the condensed consolidated balance sheets	829,000,000	[7]
Derivative assets, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, financial instruments	0	[3],[7]
Derivative assets, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, collateral	0	[4],[7]
Derivative assets, net amount	829,000,000	[7]
Liabilities:
Derivative liabilities, gross amount	(1,248,000,000)	[7]
Derivative liabilities, gross amount offset	1,248,000,000	[1],[7]
Derivative liabilities, net amount presented in the condensed consolidated balance sheets	0	[7]
Derivative liabilities, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, financial instruments	0	[3],[7]
Derivative liabilities, under master netting arrangements, amounts not offset in the condensed consolidated balance sheets, collateral	0	[4],[7]
Derivative liabilities, net amount	0	[7]
Cash and cash equivalents [Member]
Assets
Securities purchased under agreements to resell or similar arrangements	$ 15,600,000,000		$ 11,600,000,000

[1] Represents the effect of the right to offset under legally enforceable master netting arrangements to settle with the same counterparty on a net basis, including cash collateral posted and received and accrued interest.

[2] Excludes derivative assets of $28 million and $1.7 billion and derivative liabilities of $1 million and $1.1 billion recognized in our condensed consolidated balance sheets as of June 30, 2014 and December 31, 2013, respectively, that are not subject to enforceable master netting arrangements.

[3] Mortgage commitment derivative amounts reflect where we have recognized both an asset and a liability with the same counterparty under an enforceable master netting arrangement but we have not elected to offset the related amounts in our condensed consolidated balance sheets.

[4] Represents collateral posted or received that has neither been recognized nor offset in our condensed consolidated balance sheets. Does not include collateral held in excess of our exposure.

[5] Includes $15.6 billion and $11.6 billion of securities purchased under agreements to resell or similar arrangements classified as “Cash and cash equivalents” in our condensed consolidated balance sheets as of June 30, 2014 and December 31, 2013, respectively.

[6] The netting adjustment for our risk management derivatives transactions represents the effect of the legal right to offset under legally enforceable master netting arrangements to settle with the same counterparty on a net basis, including cash collateral posted and received. Cash collateral posted was $3.3 billion and $2.0 billion as of June 30, 2014 and December 31, 2013, respectively. Cash collateral received was $780 million and $1.0 billion as of June 30, 2014 and December 31, 2013, respectively.

[7] As of June 30, 2014, we net OTC-cleared derivative assets and derivative liabilities where we have enforceable master netting arrangements.