Condensed Consolidated Statement Of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income (loss)	$ (588)		$ 259
Depreciation, Amortization and Accretion, Net	1,151		1,418
Other Impairment	15		6
Changes In Fair Value Of Mortgage Servicing Rights	401		115
Provision for Loan Losses Expensed Including Discontinued Operations	169		163
Gain Loss on Sales of Loans Net Including Discontinued Operations	(252)		(215)
Available-for-sale Securities Gross Realized Gain Loss Excluding Otti Including Disc Ops	(162)		(183)
Gain Loss on Extinguishment of Debt Including Discontinued Operations	0		64
Payments for Origination and Purchases of Loans Held-for-sale	(15,801)		(25,874)
Proceeds from Sale of Loans Held-for-sale	17,499		29,166
Impairment and Accruals Related to Deconsolidation of Residential Capital, LLC	1,192		0
Trading assets	595		(154)
Deferred income taxes	(85)		(66)
Interest payable	130		(111)
Other assets	1,028		(1,288)
Other liabilities	(528)		1,815
Other, net	176		(752)
Net cash provided by (used in) operating activities	4,940		4,363
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchases of available-for-sale securities	(6,758)		(10,982)
Proceeds from sales of available-for-sale securities	5,636		8,423
Proceeds from maturities of available-for-sale securities	2,792		2,386
Net (increase) decrease in finance receivables and loans	(7,475)		(8,669)
Proceeds from sales of finance receivables and loans	1,978		1,346
Purchases of operating lease assets	(3,350)		(3,817)
Disposals of operating lease assets	892		3,621
Proceeds from sale of business units, net	516	[1]	47	[1]
Net decrease in cash and cash equivalents from deconsolidation of ResCap	(539)		0
Other, net	165		871
Net cash (used in) provided by investing activities	(6,143)		(6,774)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net change in short-term borrowings	(1,485)		(227)
Net increase in bank deposits	2,895		2,570
Proceeds from issuance of long-term debt	19,123		26,225
Repayments of long-term debt	(15,916)		(22,951)
Dividends paid	(401)		(419)
Other, net	78		551
Net cash provided by (used in) financing activities	4,294		5,749
Effect of exchange-rate changes on cash and cash equivalents	(39)		(78)
Net Cash Provided by (Used in) Continuing Operations	3,052		3,260
Net Cash Provided by (Used in) Discontinued Operations	39	[1],[2]	(29)	[1],[2]
Cash and cash equivalents at beginning of period	13,035		11,670
Cash and cash equivalents at end of period	16,126		14,901
Supplemental Cash Flow Information [Abstract]
Interest	2,563		2,886
Income taxes	273		471
Transfer of mortgage servicing rights into trading assets through certification	0		266
Proceeds from sales and repayments of mortgage loans held-for-investment originally designated as held-for-sale	$ 104		$ 110

[1] The amounts are net of cash and cash equivalents of $147 million at June 30, 2012, and $88 million at June 30, 2011, of business units at the time of disposition.

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