Parent And Guarantor Consolidating Financial Statements (Schedule Of Condensed Consolidating Statement of Cash Flow) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 2,254		$ 2,142
Purchases of available-for-sale securities	(4,626)		(3,172)
Proceeds from sales of available-for-sale securities	1,543		2,940
Proceeds from maturities of available-for-sale securities	1,604		1,222
Net (increase) decrease in finance receivables and loans	(42)		(4,409)
Net (increase) decrease in operating lease assets	(1,711)		(1,003)
Capital contributions to subsidiaries	0		0
Returns of contributed capital	0		0
Proceeds from sale of business units, net	2,829	[1]	29	[1]
Increase (Decrease) in Restricted Cash	1,067		280
Other, net	41		43
Net cash (used in) provided by investing activities	705		(4,070)
Net change in short-term borrowings	518		(546)
Net increase in bank deposits	2,360		2,089
Proceeds from issuance of long-term debt	4,253		10,749
Repayments of long-term debt	(11,445)		(10,024)
Net Change in Debt, Intercompany	0		0
Dividends paid	(200)		(200)
Dividends paid and returns of contributed capital, Intercompany	0		0
Capital contributions from parent	0		0
Net cash provided by (used in) financing activities	(4,514)		2,068
Effect of exchange-rate changes on cash and cash equivalents	67		(141)
Net Cash Provided by (Used in) Continuing Operations	(1,488)		(1)
Adjustment for change in cash and cash equivalent of operations held for sale	1,412		45
Cash and cash equivalents at beginning of period	7,513		13,035
Cash and cash equivalents at end of period	7,437		13,079
Intercompany [Member]
Condensed Financial Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	0		0
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	5,272		(412)
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	(5,260)		(3,691)
Net (increase) decrease in operating lease assets	(354)		216
Capital contributions to subsidiaries	(126)		(44)
Returns of contributed capital	158		366
Proceeds from sale of business units, net	409		29
Increase (Decrease) in Restricted Cash	0		0
Other, net	11		(48)
Net cash (used in) provided by investing activities	(5,531)		(1,523)
Net change in short-term borrowings	135		231
Net increase in bank deposits	(148)		92
Proceeds from issuance of long-term debt	24		859
Repayments of long-term debt	(347)		(574)
Net Change in Debt, Intercompany	161		390
Dividends paid	(200)		(200)
Dividends paid and returns of contributed capital, Intercompany	0		0
Capital contributions from parent	0		0
Net cash provided by (used in) financing activities	(375)		798
Effect of exchange-rate changes on cash and cash equivalents	0		(136)
Net Cash Provided by (Used in) Continuing Operations	(634)		(1,273)
Adjustment for change in cash and cash equivalent of operations held for sale	0		0
Cash and cash equivalents at beginning of period	3,972		6,261
Cash and cash equivalents at end of period	3,338		4,988
Parent [Member] | Intercompany [Member]
Condensed Financial Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	(369)		1,649
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	3,109		12
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	80		26
Net (increase) decrease in operating lease assets	0		0
Capital contributions to subsidiaries	0		0
Returns of contributed capital	149		0
Proceeds from sale of business units, net	0		0
Increase (Decrease) in Restricted Cash	(26)		0
Other, net	0		0
Net cash (used in) provided by investing activities	454		17
Net change in short-term borrowings	35		3
Net increase in bank deposits	0		0
Proceeds from issuance of long-term debt	0		5
Repayments of long-term debt	(70)		0
Net Change in Debt, Intercompany	(271)		(8)
Dividends paid	0		0
Dividends paid and returns of contributed capital, Intercompany	(3,254)		(11)
Capital contributions from parent	0		0
Net cash provided by (used in) financing activities	(3,560)		(11)
Effect of exchange-rate changes on cash and cash equivalents	0		0
Net Cash Provided by (Used in) Continuing Operations	3		18
Adjustment for change in cash and cash equivalent of operations held for sale	(3)		0
Cash and cash equivalents at beginning of period	0		14
Cash and cash equivalents at end of period	0		32
Guarantor Subsidiaries [Member] | Intercompany [Member]
Condensed Financial Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	251		(9)
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	426		2,688
Purchases of available-for-sale securities	(4,626)		(3,172)
Proceeds from sales of available-for-sale securities	1,543		2,940
Proceeds from maturities of available-for-sale securities	1,604		1,222
Net (increase) decrease in finance receivables and loans	5,138		(744)
Net (increase) decrease in operating lease assets	(1,357)		(1,219)
Capital contributions to subsidiaries	0		0
Returns of contributed capital	0		0
Proceeds from sale of business units, net	2,420		0
Increase (Decrease) in Restricted Cash	1,093		280
Other, net	30		91
Net cash (used in) provided by investing activities	6,157		(570)
Net change in short-term borrowings	348		(780)
Net increase in bank deposits	2,553		1,997
Proceeds from issuance of long-term debt	4,229		9,885
Repayments of long-term debt	(11,028)		(9,450)
Net Change in Debt, Intercompany	118		(1,640)
Dividends paid	0		0
Dividends paid and returns of contributed capital, Intercompany	(3,606)		(501)
Capital contributions from parent	126		44
Net cash provided by (used in) financing activities	(7,260)		(445)
Effect of exchange-rate changes on cash and cash equivalents	67		(5)
Net Cash Provided by (Used in) Continuing Operations	(610)		1,668
Adjustment for change in cash and cash equivalent of operations held for sale	1,415		45
Cash and cash equivalents at beginning of period	4,032		7,276
Cash and cash equivalents at end of period	4,837		8,989
Non-Guarantor Subsidiaries [Member] | Intercompany [Member]
Condensed Financial Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	312		32
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(6,553)		(146)
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
Net (increase) decrease in operating lease assets	0		0
Capital contributions to subsidiaries	126		44
Returns of contributed capital	(307)		(366)
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	(375)		(1,994)
Net change in short-term borrowings	0		0
Net increase in bank deposits	(45)		0
Proceeds from issuance of long-term debt	0		0
Repayments of long-term debt	0		0
Net Change in Debt, Intercompany	(8)		1,258
Dividends paid	0		0
Dividends paid and returns of contributed capital, Intercompany	6,860		512
Capital contributions from parent	(126)		(44)
Net cash provided by (used in) financing activities	6,681		1,726
Effect of exchange-rate changes on cash and cash equivalents	0		0
Net Cash Provided by (Used in) Continuing Operations	(247)		(414)
Adjustment for change in cash and cash equivalent of operations held for sale	0		0
Cash and cash equivalents at beginning of period	(491)		(516)
Cash and cash equivalents at end of period	(738)		(930)
Consolidation, Eliminations [Member] | Intercompany [Member]
Condensed Financial Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	$ (194)		$ (1,672)

[1] The amounts are net of cash and cash equivalents of $905 million at March 31, 2013 and $64 million at March 31, 2012 of business units at the time of disposition.