Parent And Guarantor Consolidating Financial Statements (Schedule Of Condensed Consolidating Statement of Cash Flow) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 3,403		$ 2,501		$ 5,049
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 and Leases Held-for-investment	2,592				2,332
Net (increase) decrease in operating lease assets	(4,024)		(6,232)		(5,699)
Capital contributions to subsidiaries	0		0		0
Returns of contributed capital	0		0		0
Cash Divested from Deconsolidation	0		0		(539)
Payments for (Proceeds from) Mortgage Servicing Rights			911
Proceeds from sale of business units, net	47	[1]	7,444	[1]	516	[1]
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 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)
Net Change in Debt, Intercompany	0		0		0
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)
Dividends paid and returns of contributed capital	0		0		0
Capital contributions from parent	0		0		0
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
Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	330		3,015		102
Purchases of available-for-sale securities	0		0		0
Proceeds from sales of available-for-sale securities	0		0		0
Proceeds from maturities of available-for-sale securities	0		0		0
Net (increase) decrease in finance receivables and loans	1,900		4,898		3,027
Proceeds from Sale of Loans and Leases Held-for-investment	0				352
Net (increase) decrease in operating lease assets	716		(1,320)		(2,268)
Capital contributions to subsidiaries	(1,179)		(477)		(261)
Returns of contributed capital	1,422		1,002		2,079
Cash Divested from Deconsolidation					0
Payments for (Proceeds from) Mortgage Servicing Rights			0
Proceeds from sale of business units, net	46		1,799		29
Increase (Decrease) in Restricted Cash	0		0		0
Other, net	(29)		41		(247)
Net cash (used in) provided by investing activities	4,304		6,244		6,345
Net change in short-term borrowings	113		131		338
Net increase in bank deposits	(121)		(543)		(785)
Proceeds from issuance of long-term debt	3,132		3,236		3,613
Repayments of long-term debt	(8,186)		(9,468)		(11,238)
Net Change in Debt, Intercompany	52		1,803		(44)
Proceeds from Issuance of Common Stock			1,270
Payments for Repurchase of Convertible Preferred Stock			(5,925)
Dividends paid	(268)		(810)		(802)
Dividends paid and returns of contributed capital	0		0		0
Capital contributions from parent	0		0		0
Net cash provided by (used in) financing activities	(5,278)		(10,306)		(8,918)
Effect of exchange-rate changes on cash and cash equivalents	0		0		(63)
Cash and Cash Equivalents, Period Increase (Decrease)	(644)		(1,047)		(2,534)
Net Cash Provided by (Used in) Discontinued Operations			0		0
Cash and cash equivalents at beginning of period	2,930		3,977		6,511
Cash and cash equivalents at end of period	2,286		2,930		3,977
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,789		3,572		306
Purchases of available-for-sale securities	0		0		0
Proceeds from sales of available-for-sale securities	0		0		0
Proceeds from maturities of available-for-sale securities	0		0		0
Net (increase) decrease in finance receivables and loans	0		79		2
Proceeds from Sale of Loans and Leases Held-for-investment	0				0
Net (increase) decrease in operating lease assets	0		0		0
Capital contributions to subsidiaries	0		0		0
Returns of contributed capital	0		150		0
Cash Divested from Deconsolidation					0
Payments for (Proceeds from) Mortgage Servicing Rights			0
Proceeds from sale of business units, net	0		554		0
Increase (Decrease) in Restricted Cash	0		(26)		(13)
Other, net	0		0		0
Net cash (used in) provided by investing activities	0		1,008		94
Net change in short-term borrowings	0		36		25
Net increase in bank deposits	0		0		1
Proceeds from issuance of long-term debt	0		0		70
Repayments of long-term debt	0		(70)		(73)
Net Change in Debt, Intercompany	0		(271)		(149)
Proceeds from Issuance of Common Stock			0
Payments for Repurchase of Convertible Preferred Stock			0
Dividends paid	0		0		0
Dividends paid and returns of contributed capital	(1,826)		(4,267)		(457)
Capital contributions from parent	0		29		169
Net cash provided by (used in) financing activities	(1,826)		(4,543)		(414)
Effect of exchange-rate changes on cash and cash equivalents	0		0		0
Cash and Cash Equivalents, Period Increase (Decrease)	(37)		37		(14)
Net Cash Provided by (Used in) Discontinued Operations			0		0
Cash and cash equivalents at beginning of period	37		0		14
Cash and cash equivalents at end of period	0		37		0
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	5,533		5,305		5,862
Purchases of available-for-sale securities	(5,417)		(12,304)		(12,816)
Proceeds from sales of available-for-sale securities	4,277		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	(6,941)		(7,456)		(14,972)
Proceeds from Sale of Loans and Leases Held-for-investment	2,592				1,980
Net (increase) decrease in operating lease assets	(4,740)		(4,912)		(3,431)
Capital contributions to subsidiaries	0		0		0
Returns of contributed capital	0		0		0
Cash Divested from Deconsolidation					(539)
Payments for (Proceeds from) Mortgage Servicing Rights			911
Proceeds from sale of business units, net	1		5,091		487
Increase (Decrease) in Restricted Cash	1,625		(44)		(1,685)
Other, net	101		10		204
Net cash (used in) provided by investing activities	(5,691)		(11,071)		(17,308)
Net change in short-term borrowings	(1,607)		1,424		2,331
Net increase in bank deposits	4,994		5,879		7,476
Proceeds from issuance of long-term debt	24,038		24,076		35,718
Repayments of long-term debt	(22,240)		(22,354)		(28,598)
Net Change in Debt, Intercompany	(1,428)		(624)		(3,739)
Proceeds from Issuance of Common Stock			0
Payments for Repurchase of Convertible Preferred Stock			0
Dividends paid	0		0		0
Dividends paid and returns of contributed capital	(3,846)		(6,275)		(2,843)
Capital contributions from parent	1,179		448		92
Net cash provided by (used in) financing activities	1,090		2,574		10,437
Effect of exchange-rate changes on cash and cash equivalents	(1)		45		5
Cash and Cash Equivalents, Period Increase (Decrease)	931		(3,147)		(1,004)
Net Cash Provided by (Used in) Discontinued Operations			2,094		(1,995)
Cash and cash equivalents at beginning of period	2,974		4,027		7,026
Cash and cash equivalents at end of period	3,905		2,974		4,027
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(4,249)		(9,391)		(1,221)
Purchases of available-for-sale securities	0		0		0
Proceeds from sales of available-for-sale securities	(17)		0		0
Proceeds from maturities of available-for-sale securities	0		0		0
Net (increase) decrease in finance receivables and loans	17		0		0
Proceeds from Sale of Loans and Leases Held-for-investment	0				0
Net (increase) decrease in operating lease assets	0		0		0
Capital contributions to subsidiaries	1,179		477		261
Returns of contributed capital	(1,422)		(1,152)		(2,079)
Cash Divested from Deconsolidation					0
Payments for (Proceeds from) Mortgage Servicing Rights			0
Proceeds from sale of business units, net	0		0		0
Increase (Decrease) in Restricted Cash	0		0		0
Other, net	0		0		0
Net cash (used in) provided by investing activities	(1,825)		276		(5,686)
Net change in short-term borrowings	0		0		0
Net increase in bank deposits	0		39		(39)
Proceeds from issuance of long-term debt	0		0		0
Repayments of long-term debt	0		0		0
Net Change in Debt, Intercompany	1,376		(908)		3,932
Proceeds from Issuance of Common Stock			0
Payments for Repurchase of Convertible Preferred Stock			0
Dividends paid	0		0		0
Dividends paid and returns of contributed capital	5,672		10,542		3,300
Capital contributions from parent	(1,179)		(477)		(261)
Net cash provided by (used in) financing activities	5,869		9,196		6,932
Effect of exchange-rate changes on cash and cash equivalents	0		0		0
Cash and Cash Equivalents, Period Increase (Decrease)	(205)		81		25
Net Cash Provided by (Used in) Discontinued Operations			0		0
Cash and cash equivalents at beginning of period	(410)		(491)		(516)
Cash and cash equivalents at end of period	(615)		(410)		(491)
Affiliated Entity [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	0		0		0
Affiliated Entity [Member] | Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	1,428		301		3,634
Affiliated Entity [Member] | Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	0		251		105
Affiliated Entity [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	154		(1,503)		129
Affiliated Entity [Member] | Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	$ (1,582)		$ 951		$ (3,868)

[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.