Assets and Liabilities of Businesses Held For Sale and Discontinued Operations (Rollforward of the Reserve) (Details) (WMC Discontinued Operations [Member], USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 10, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
WMC Discontinued Operations [Member]
Roll Forward Of Reserve And Pending Claims [Abstract]
Reserve, beginning of period	$ 588	$ 549	$ 787	$ 800	$ 633	$ 633
Provision		40	18	142	172
Claim resolutions		(1)	(5)	(354)	(5)
Reserve, end of period		588	800	588	800	800
Pending claims, beginning of period	3,694			5,643
New claims	864			8,266		6,780
Pending claims, end of period		3,694		3,694		5,643
Claims Relating To Alleged Breaches Of Representations That Are Beyond Applicable Statute Of Llimitations		$ 1,156		$ 1,156