Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating activities:
Income from continuing operations, net of tax	$ 2,380	$ 1,698
Loss from discontinued operations, net of tax	(197)	(202)
Net income	2,183	1,496
Adjustments to reconcile net income to cash provided by operating activities:
Provision for credit losses	1,647	2,250
Depreciation and amortization, net	1,152	671
Net gains on sales of securities available for sale	(4)	(41)
Impairment losses on securities available for sale	29	27
Bargain purchase gain	0	(594)
Loans held for sale:
Originations	(552)	(934)
Gains on sales	(18)	(29)
Proceeds from sales and paydowns	1,322	996
Stock plan compensation expense	112	116
Changes in operating assets and liabilities, net of effects of acquisitions:
(Increase) decrease in interest receivable	240	(424)
(Increase) decrease in other assets	289	22
Increase (decrease) in interest payable	(126)	(4)
Increase (decrease) in other liabilities	(355)	458
Net cash (used in) provided by operating activities attributable to discontinued operations	(287)	21
Net cash provided by operating activities	5,632	4,031
Investing activities:
Increase in restricted cash for securitization investors	51	421
Purchases of securities available for sale	(10,502)	(9,095)
Proceeds from paydowns and maturities of securities available for sale	8,486	8,651
Proceeds from sales of securities available for sale	1,320	14,258
Net (increase) decrease in loans held for investment	3,997	(1,517)
Principal recoveries of loans previously charged off	827	768
Additions of premises and equipment	(450)	(262)
Net cash paid for acquisitions	0	(17,603)
Net cash provided by (used in) investing activities	3,729	(4,379)
Financing activities:
Net increase (decrease) in deposits	(2,628)	1,279
Issuance of securitized debt obligation	1,450	0
Maturities and paydowns of securitized debt obligations	(2,017)	(2,919)
Issuance of senior and subordinated notes	934	1,250
Redemption of junior subordinated debentures	(3,641)	0
Maturities and redemptions of senior and subordinate notes	(500)	(282)
Net decrease in other borrowings	(9,191)	(1,989)
Net proceeds from issuances of common stock	44	3,200
Proceeds from share-based payment activities	44	45
Dividends paid on common stock	(206)	(53)
Dividends paid on preferred stock	(26)	0
Purchases of treasury stock	(29)	(42)
Net cash provided by (used in) financing activities	(15,766)	489
Increase (decrease) in cash and cash equivalents	(6,405)	141
Cash and cash equivalents at beginning of the period	11,058	5,838
Cash and cash equivalents at end of the period	4,653	5,979
Non-cash items:
Fair value of common stock issued in business acquisition	0	2,638
Net transfers of loans held for investment to loans held for sale	6,820	45
Redemption of senior and subordinated notes	(1,969)	0
Issuance of senior and subordinated notes	$ 1,968	$ 0