Consolidated Statement Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income (loss)	$ 1,150		$ 361		$ 1,196
Depreciation, Amortization and Accretion, Net	2,936		2,864		2,381
Changes In Fair Value Of Mortgage Servicing Rights	0		101		677
Provision for Loan Losses Expensed Including Discontinued Operations	457		570		405
Gain Loss on Sales of Loans Net Including Discontinued Operations	(7)		(55)		(527)
Available-for-sale Securities Gross Realized Gain Loss Excluding Otti Including Disc Ops	(181)		(182)		(177)
Gain (loss) on extinguishment of debt	202		59		148
Payments for Origination and Purchases of Loans Held-for-sale	0		(6,235)		(33,075)
Proceeds from Sale of Loans Held-for-sale	62		8,696		34,073
Total Charge Recorded Related to ResCap Bankruptcy	(150)		(600)		1,192
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	7		(666)		(28)
Trading assets	0		0		595
Deferred income taxes	117		(671)		(1,491)
Interest payable	(411)		(39)		(311)
Other assets	(132)		2,592		802
Other liabilities	(400)		(3,860)		(595)
Other, net	(247)		(434)		(216)
Net cash provided by (used in) operating activities	3,403		2,501		5,049
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchases of available-for-sale securities	(5,417)		(12,304)		(12,816)
Proceeds from sales of available-for-sale securities	4,260		3,627		7,662
Proceeds from maturities of available-for-sale securities	2,657		5,509		5,673
Net (increase) decrease in finance receivables and loans	(5,024)		(2,479)		(11,943)
Proceeds from Sale of Loans Held-for-investment	2,592		0		2,332
Purchases of operating lease assets	(9,884)		(9,196)		(7,444)
Disposals of operating lease assets	5,860		2,964		1,745
Proceeds from Sale of Mortgage Servicing Rights (MSR)	0		911		0
Proceeds from sale of business units, net	47	[1]	7,444	[1]	516	[1]
Net decrease in cash and cash equivalents from deconsolidation of ResCap	0		0		(539)
Increase (Decrease) in Restricted Cash	1,625		(70)		(1,698)
Other, net	72		51		(43)
Net cash (used in) provided by investing activities	(3,212)		(3,543)		(16,555)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net change in short-term borrowings	(1,494)		1,591		2,694
Net increase in bank deposits	4,873		5,375		6,653
Proceeds from issuance of long-term debt	27,170		27,312		39,401
Repayments of long-term debt	(30,426)		(31,892)		(39,909)
Proceeds from Issuance of Common Stock	0		1,270		0
Payments for Repurchase of Convertible Preferred Stock	0		(5,925)		0
Dividends paid	(268)		(810)		(802)
Net cash provided by (used in) financing activities	(145)		(3,079)		8,037
Effect of exchange-rate changes on cash and cash equivalents	(1)		45		(58)
Cash and Cash Equivalents, Period Increase (Decrease)	45		(4,076)		(3,527)
Net Cash Provided by (Used in) Discontinued Operations	0	[1],[2]	2,094	[1],[2]	(1,995)	[1],[2]
Cash and cash equivalents at beginning of period	5,531		7,513		13,035
Cash and cash equivalents at end of period	5,576		5,531		7,513
Cash and cash equivalents of business units at the time of disposition			1,600		147
Supplemental Cash Flow Information [Abstract]
Interest	3,090		3,827		5,311
Income taxes	8		75		404
Transfer of Portfolio Loans and Leases to Held-for-sale	4,631		18		2,135
Proceeds from sales and repayments of mortgage loans held-for-investment originally designated as held-for-sale	$ 38		$ 51		$ 127

[1] The amounts are net of cash and cash equivalents of $1.6 billion at December 31, 2013, and $147 million at December 31, 2012 of business units at the time of disposition.

[2] Cash flows of discontinued operations are reflected within operating, investing, and financing activities in the Consolidated Statement of Cash Flows. The cash balance of these operations is reported as assets of operations held-for-sale on the Consolidated Balance Sheet.