Condensed Consolidated Statement Of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income (loss)	$ (204)		$ 49
Depreciation, Amortization and Accretion, Net	1,758		2,100
Other Impairment	31		8
Changes In Fair Value Of Mortgage Servicing Rights	654		1,327
Provision for Loan Losses Expensed Including Discontinued Operations	285		211
Gain Loss on Sales of Loans Net Including Discontinued Operations	(396)		(299)
Available-for-sale Securities Gross Realized Gain Loss Excluding Otti Including Disc Ops	(144)		(275)
Gain Loss on Extinguishment of Debt Including Discontinued Operations	0		64
Payments for Origination and Purchases of Loans Held-for-sale	(23,670)		(42,467)
Proceeds from Sale of Loans Held-for-sale	25,295		44,417
Impairment and Accruals Related to Deconsolidation of Residential Capital, LLC	1,192		0
Trading assets	595		(339)
Deferred income taxes	(199)		(99)
Interest payable	168		(99)
Other assets	475		(324)
Other liabilities	(761)		1,374
Other, net	(234)		133
Net cash provided by (used in) operating activities	4,845		5,781
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchases of available-for-sale securities	(9,592)		(15,020)
Proceeds from sales of available-for-sale securities	6,774		12,093
Proceeds from maturities of available-for-sale securities	4,940		3,725
Net (increase) decrease in finance receivables and loans	(7,925)		(10,705)
Proceeds from sales of finance receivables and loans	2,329		2,868
Purchases of operating lease assets	(5,612)		(5,332)
Disposals of operating lease assets	1,303		4,862
Proceeds from sale of business units, net	516	[1]	50	[1]
Net decrease in cash and cash equivalents from deconsolidation of ResCap	(539)		0
Other, net	75		633
Net cash (used in) provided by investing activities	(7,731)		(6,826)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net change in short-term borrowings	(1,673)		(1,263)
Net increase in bank deposits	4,673		4,454
Proceeds from issuance of long-term debt	27,520		36,900
Repayments of long-term debt	(22,908)		(34,576)
Dividends paid	(601)		(619)
Other, net	(26)		962
Net cash provided by (used in) financing activities	6,985		5,858
Effect of exchange-rate changes on cash and cash equivalents	(1)		(45)
Net Cash Provided by (Used in) Continuing Operations	4,098		4,768
Net Cash Provided by (Used in) Discontinued Operations	24	[1],[2]	(36)	[1],[2]
Cash and cash equivalents at beginning of period	13,035		11,670
Cash and cash equivalents at end of period	17,157		16,402
Supplemental Cash Flow Information [Abstract]
Interest	3,705		4,303
Income taxes	291		454
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	$ 116		$ 179

[1] The amounts are net of cash and cash equivalents of $147 million at September 30, 2012, and $88 million at September 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.