Assets and Liabilities of Businesses Held For Sale and Discontinued Operations (WMC) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Roll forward of reserve and pending claims
Revenues from discontinued operations	$ (40)	$ 107	$ (11)	$ 161
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent			(24)	(243)
WMC Discontinued Operations [Member]
Financial Information For Discontinued Operations [Line Items]
Adjustment For Pending Claims For Unmet Representations And Warranties			251
Roll forward of reserve and pending claims
Reserve, beginning of period	550	740	800	633	633
Provision	102	47	102	154
Claim resolutions	(103)	0	(353)	0
Reserve, end of period	549	787	549	787	800
Pending claims, beginning of period			5,643
New claims			8,337		6,780
Claims Relating To Alleged Breaches Of Representations That Are Beyond Applicable Statute Of Llimitations			1,000
Pending claims, end of period	3,759		3,759		5,643
Lawsuit Relating To Representations And Warranties Amount Of Mortgages	12,096		12,096
Number Of Lawsuits Involving Repurchase Claims On Loans			14
Number Of Securitizations Related To Lawsuits Involving repurchase Claims On Loans In Which Adverse Parties Are Securitization Trustees			13
Revenues from discontinued operations	(39)	(47)	(35)	(154)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(30)	(33)	(32)	(105)
WMC Discontinued Operations [Member] | Lower Limit [Member]
Roll forward of reserve and pending claims
Increase To Reserve For Claims For Unmet Representations And Warranties For Adverse Effect In Assumptions	0		0
WMC Discontinued Operations [Member] | Upper Limit [Member]
Roll forward of reserve and pending claims
Increase To Reserve For Claims For Unmet Representations And Warranties For Adverse Effect In Assumptions	$ 500		$ 500