Assets and Liabilities of Businesses Held For Sale and Discontinued Operations (WMC) (Details) (USD $) In Millions, unless otherwise specified	2 Months Ended	12 Months Ended
	Feb. 27, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Roll Forward Of Reserve And Pending Claims [Abstract]
Revenues from discontinued operations		$ 186	$ 190	$ 1,074
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		(2,054)	(1,130)	30
WMC Discontinued Operations [Member]
Financial Information For Discontinued Operations [Line Items]
Adjustment For Pending Claims For Unmet Representations And Warranties		167
Roll Forward Of Reserve And Pending Claims [Abstract]
Reserve, beginning of period	800	633	143
Provision		354	500
Claim resolutions		(187)	(10)
Reserve, end of period		800	633	143
Pending claims, beginning of period	5,643	5,357	705
New claims		1,259	4,838
Claim resolutions	123	(973)	(186)
Pending claims, end of period		5,643	5,357	705
Percentage Increase To Estimated Loss On Loans Tendered		100.00%
Increase To Reserve For Claims For Unmet Representations And Warranties For Adverse Effect In Assumptions		525
Number Of Lawsuits Involving Repurchase Claims On Loans	14	17
Number Of Securitizations Related To Lawsuits Involving repurchase Claims On Loans In Which Adverse Parties Are Securitization Trustees		15
Number Of Lawsuits Involving Repurchase Claims On Loans Based On Breach Of Contract Claims On Mortgage Loans		12
Number Of Lawsuits Involving Repurchase Claims On Loans Initiated By Divested Business	one
Number Of Litigation Claims That Are Samplings Based Claims		two
Loss Contingency, Claims Dismissed, Number	3
Decrease In Litigation Claims	318
Sampling Based Litigation Claims Amount Of Mortgages		600
Number Of Litigation Claims Based On Alleged Failure To Provide Notice On Defective Loans Breach Of Corporate Representation And Warranty On Non Specific Claims for Recessionary Damages		ten
Liabilities Related To Remaining Litigation Claims		6,200
Post Statute Of Limitation Claims		2,200
Post Statute Of Limitation Litigation Claims		1,700
Revenues from discontinued operations		(346)	(500)	(42)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		$ (232)	$ (337)	$ (34)