Description Of Business, Basis Of Presentation, And Changes In Significant Accounting Policies ResCap Results of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
ResCap Results of Operations [Line Items]
Total net revenue (loss)	$ 1,092	$ 1,247	$ 1,205	$ 1,354	$ 1,098	$ 632	$ 1,214	$ 1,034	$ 4,898	$ 3,978	$ 5,722
Provision for loan losses	92	105	34	98	(13)	57	59	85	329	188	357
Total noninterest expense	1,037	877	2,290	1,120	1,420	983	1,277	1,061	5,324	4,741	4,973
Income (loss) from continuing operations before income tax expense	(37)	265	(1,119)	136	(309)	(408)	(122)	(112)	(755)	(951)	392
Income tax expense (benefit) from continuing operations	(1,337)	43	(8)	18	10	13	9	19	(1,284)	51	104
Net income (loss) from continuing operations	1,300	222	(1,111)	118	(319)	(421)	(131)	(131)	529	(1,002)	288
ResCap LLC [Member]
ResCap Results of Operations [Line Items]
Total net revenue (loss)									476	632	2,051
Provision for loan losses									0	24	(7)
Total noninterest expense									437	1,438	1,526
Income (loss) from continuing operations before income tax expense									39	(830)	532
Income tax expense (benefit) from continuing operations									7	15	7
Net income (loss) from continuing operations									$ 32	$ (845)	$ 525