Parent And Guarantor Consolidating Financial Statements (Schedule Of Condensed Consolidating Statement of Cash Flow) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 2,458		$ 4,365
Purchases of available-for-sale securities	(4,117)		(12,747)
Proceeds from sales of available-for-sale securities	2,974		4,721
Proceeds from maturities of available-for-sale securities	1,877		3,893
Net (increase) decrease in finance receivables and loans	(1,267)		2,744
Proceeds from Sale of Loans Held-for-sale	1,557
Net (increase) decrease in operating lease assets	(3,265)		(5,171)
Capital contributions to subsidiaries	0		0
Returns of contributed capital	0		0
Proceeds from Sale of Mortgage Servicing Rights (MSR)	0		911
Proceeds from sale of business units, net	47	[1]	6,937	[1]
Increase (Decrease) in Restricted Cash	2,128		2,297
Other, net	71		(55)
Net cash (used in) provided by investing activities	5		3,530
Net change in short-term borrowings	(3,298)		(936)
Net increase in bank deposits	3,501		4,057
Proceeds from issuance of long-term debt	18,942		13,347
Repayments of long-term debt	(21,239)		(26,725)
Net Change in Debt, Intercompany	0		0
Dividends paid	(200)		(601)
Dividends paid and returns of contributed capital, Intercompany	0		0
Capital contributions from parent	0		0
Net cash provided by (used in) financing activities	(2,294)		(10,858)
Effect of exchange-rate changes on cash and cash equivalents	(1)		47
Cash and Cash Equivalents, Period Increase (Decrease)	168		(2,916)
Net Cash Provided by (Used in) Discontinued Operations	0	[1],[2]	1,952	[1],[2]
Cash and cash equivalents at beginning of period	5,531		7,513
Cash and cash equivalents at end of period	5,699		6,549
Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	544		5,198
Purchases of available-for-sale securities	0		0
Proceeds from sales of available-for-sale securities	0		0
Proceeds from maturities of available-for-sale securities	0		0
Net (increase) decrease in finance receivables and loans	1,669		(3,527)
Proceeds from Sale of Loans Held-for-sale	0
Net (increase) decrease in operating lease assets	146		(1,111)
Capital contributions to subsidiaries	(744)		(176)
Returns of contributed capital	1,251		769
Proceeds from Sale of Mortgage Servicing Rights (MSR)			0
Proceeds from sale of business units, net	46		1,123
Increase (Decrease) in Restricted Cash	0		0
Other, net	(17)		(200)
Net cash (used in) provided by investing activities	2,247		(2,780)
Net change in short-term borrowings	151		105
Net increase in bank deposits	(72)		(433)
Proceeds from issuance of long-term debt	2,310		2,213
Repayments of long-term debt	(5,535)		(6,331)
Net Change in Debt, Intercompany	(143)		1,674
Dividends paid	(200)		(601)
Dividends paid and returns of contributed capital, Intercompany	0		0
Capital contributions from parent	0		0
Net cash provided by (used in) financing activities	(3,489)		(3,373)
Effect of exchange-rate changes on cash and cash equivalents	0		0
Cash and Cash Equivalents, Period Increase (Decrease)	(698)		(955)
Net Cash Provided by (Used in) Discontinued Operations			0
Cash and cash equivalents at beginning of period	2,930		3,977
Cash and cash equivalents at end of period	2,232		3,022
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,639		3,514
Purchases of available-for-sale securities	0		0
Proceeds from sales of available-for-sale securities	0		0
Proceeds from maturities of available-for-sale securities	0		0
Net (increase) decrease in finance receivables and loans	0		79
Proceeds from Sale of Loans Held-for-sale	0
Net (increase) decrease in operating lease assets	0		0
Capital contributions to subsidiaries	0		0
Returns of contributed capital	0		150
Proceeds from Sale of Mortgage Servicing Rights (MSR)			0
Proceeds from sale of business units, net	0		554
Increase (Decrease) in Restricted Cash	0		(26)
Other, net	0		0
Net cash (used in) provided by investing activities	0		1,008
Net change in short-term borrowings	0		36
Net increase in bank deposits	0		0
Proceeds from issuance of long-term debt	0		0
Repayments of long-term debt	0		(70)
Net Change in Debt, Intercompany	0		(271)
Dividends paid	0		0
Dividends paid and returns of contributed capital, Intercompany	(1,676)		(4,217)
Capital contributions from parent	0		29
Net cash provided by (used in) financing activities	(1,676)		(4,493)
Effect of exchange-rate changes on cash and cash equivalents	0		0
Cash and Cash Equivalents, Period Increase (Decrease)	(37)		29
Net Cash Provided by (Used in) Discontinued Operations			0
Cash and cash equivalents at beginning of period	37		0
Cash and cash equivalents at end of period	0		29
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	4,036		4,528
Purchases of available-for-sale securities	(4,117)		(12,747)
Proceeds from sales of available-for-sale securities	2,974		4,721
Proceeds from maturities of available-for-sale securities	1,877		3,893
Net (increase) decrease in finance receivables and loans	(2,936)		6,192
Proceeds from Sale of Loans Held-for-sale	1,557
Net (increase) decrease in operating lease assets	(3,411)		(4,060)
Capital contributions to subsidiaries	0		0
Returns of contributed capital	0		0
Proceeds from Sale of Mortgage Servicing Rights (MSR)			911
Proceeds from sale of business units, net	1		5,260
Increase (Decrease) in Restricted Cash	2,128		2,323
Other, net	88		145
Net cash (used in) provided by investing activities	(1,692)		5,262
Net change in short-term borrowings	(3,449)		(1,077)
Net increase in bank deposits	3,573		4,527
Proceeds from issuance of long-term debt	16,632		11,134
Repayments of long-term debt	(15,704)		(20,324)
Net Change in Debt, Intercompany	104		(664)
Dividends paid	0		0
Dividends paid and returns of contributed capital, Intercompany	(3,337)		(5,577)
Capital contributions from parent	744		147
Net cash provided by (used in) financing activities	(1,437)		(11,834)
Effect of exchange-rate changes on cash and cash equivalents	(1)		47
Cash and Cash Equivalents, Period Increase (Decrease)	906		(1,997)
Net Cash Provided by (Used in) Discontinued Operations			1,952
Cash and cash equivalents at beginning of period	2,974		4,027
Cash and cash equivalents at end of period	3,880		3,982
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(3,761)		(8,875)
Purchases of available-for-sale securities	0		0
Proceeds from sales of available-for-sale securities	0		0
Proceeds from maturities of available-for-sale securities	0		0
Net (increase) decrease in finance receivables and loans	0		0
Proceeds from Sale of Loans Held-for-sale	0
Net (increase) decrease in operating lease assets	0		0
Capital contributions to subsidiaries	744		176
Returns of contributed capital	(1,251)		(919)
Proceeds from Sale of Mortgage Servicing Rights (MSR)			0
Proceeds from sale of business units, net	0		0
Increase (Decrease) in Restricted Cash	0		0
Other, net	0		0
Net cash (used in) provided by investing activities	(550)		40
Net change in short-term borrowings	0		0
Net increase in bank deposits	0		(37)
Proceeds from issuance of long-term debt	0		0
Repayments of long-term debt	0		0
Net Change in Debt, Intercompany	39		(739)
Dividends paid	0		0
Dividends paid and returns of contributed capital, Intercompany	5,013		9,794
Capital contributions from parent	(744)		(176)
Net cash provided by (used in) financing activities	4,308		8,842
Effect of exchange-rate changes on cash and cash equivalents	0		0
Cash and Cash Equivalents, Period Increase (Decrease)	(3)		7
Net Cash Provided by (Used in) Discontinued Operations			0
Cash and cash equivalents at beginning of period	(410)		(491)
Cash and cash equivalents at end of period	(413)		(484)
Affiliated Entity [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	0		0
Affiliated Entity [Member] | Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	(104)		342
Affiliated Entity [Member] | Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	0		251
Affiliated Entity [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	147		(1,376)
Affiliated Entity [Member] | Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	$ (43)		$ 783

[1] The amount at September 30, 2013, is net of cash and cash equivalents of $1,418 million 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.