Parent And Guarantor Consolidating Financial Statements (Schedule Of Condensed Consolidating Statement of Cash Flow) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 1,743	$ 1,513
Purchases of available-for-sale securities	(8,165)	(2,411)
Proceeds from sales of available-for-sale securities	2,865	2,144
Proceeds from maturities of available-for-sale securities	2,192	1,136
Net (increase) decrease in finance receivables and loans	(5,471)	(736)
Proceeds from Sale of Loans Held-for-sale	1,582
Net (increase) decrease in operating lease assets	361	(2,189)
Capital contributions to subsidiaries	0	0
Returns of contributed capital	0	0
Proceeds from sale of business units, net	1,049	47
Increase (Decrease) in Restricted Cash	449	2,060
Other, net	(54)	39
Net cash (used in) provided by investing activities	(5,192)	90
Net change in short-term borrowings	2,945	(2,181)
Net increase in bank deposits	3,724	2,741
Proceeds from issuance of long-term debt	17,807	14,956
Repayments of long-term debt	(18,984)	(16,739)
Net Change in Debt, Intercompany	0	0
Repurchase and Redemption of Preferred Stock	(442)	0
Dividends paid	(1,318)	(134)
Dividends paid and returns of contributed capital, Intercompany	0	0
Capital contributions from parent	0	0
Net cash provided by (used in) financing activities	3,732	(1,357)
Effect of exchange-rate changes on cash and cash equivalents	(1)	0
Cash and Cash Equivalents, Period Increase (Decrease)	282	246
Cash and cash equivalents at beginning of period	5,576	5,531
Cash and cash equivalents at end of period	5,858	5,777
Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(64)	1,030
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	787	2,737
Proceeds from Sale of Loans Held-for-sale	0
Net (increase) decrease in operating lease assets	0	17
Capital contributions to subsidiaries	(169)	(687)
Returns of contributed capital	602	1,126
Proceeds from sale of business units, net	1,049	(46)
Increase (Decrease) in Restricted Cash	0	(3)
Other, net	(10)	(9)
Net cash (used in) provided by investing activities	4,857	2,680
Net change in short-term borrowings	121	115
Net increase in bank deposits	(72)	(42)
Proceeds from issuance of long-term debt	3,780	1,305
Repayments of long-term debt	(5,837)	(5,521)
Net Change in Debt, Intercompany	(1,131)	(23)
Repurchase and Redemption of Preferred Stock	(442)
Dividends paid	(1,318)	(134)
Dividends paid and returns of contributed capital, Intercompany	0	0
Capital contributions from parent	0	0
Net cash provided by (used in) financing activities	(4,899)	(4,300)
Effect of exchange-rate changes on cash and cash equivalents	0
Cash and Cash Equivalents, Period Increase (Decrease)	(106)	(590)
Cash and cash equivalents at beginning of period	2,286	2,930
Cash and cash equivalents at end of period	2,180	2,340
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	525	1,489
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	(1)	0
Returns of contributed capital	0	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	(1)	0
Net change in short-term borrowings	0	0
Net increase in bank deposits	0	0
Proceeds from issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Net Change in Debt, Intercompany	0	0
Repurchase and Redemption of Preferred Stock	0
Dividends paid	0	0
Dividends paid and returns of contributed capital, Intercompany	(525)	(1,500)
Capital contributions from parent	1	0
Net cash provided by (used in) financing activities	(524)	(1,500)
Effect of exchange-rate changes on cash and cash equivalents	0
Cash and Cash Equivalents, Period Increase (Decrease)	0	(11)
Cash and cash equivalents at beginning of period	0	37
Cash and cash equivalents at end of period	0	26
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	2,817	2,314
Purchases of available-for-sale securities	(8,165)	(2,411)
Proceeds from sales of available-for-sale securities	2,865	2,144
Proceeds from maturities of available-for-sale securities	2,192	1,136
Net (increase) decrease in finance receivables and loans	(6,258)	(3,473)
Proceeds from Sale of Loans Held-for-sale	1,582
Net (increase) decrease in operating lease assets	361	(2,206)
Capital contributions to subsidiaries	1	0
Returns of contributed capital	0	0
Proceeds from sale of business units, net	0	(1)
Increase (Decrease) in Restricted Cash	449	2,063
Other, net	(44)	48
Net cash (used in) provided by investing activities	(5,758)	(2,673)
Net change in short-term borrowings	2,824	(2,296)
Net increase in bank deposits	3,796	2,783
Proceeds from issuance of long-term debt	14,027	13,651
Repayments of long-term debt	(13,147)	(11,218)
Net Change in Debt, Intercompany	(2,597)	548
Repurchase and Redemption of Preferred Stock	0
Dividends paid	0	0
Dividends paid and returns of contributed capital, Intercompany	(1,612)	(2,947)
Capital contributions from parent	168	687
Net cash provided by (used in) financing activities	3,459	1,208
Effect of exchange-rate changes on cash and cash equivalents	(1)
Cash and Cash Equivalents, Period Increase (Decrease)	517	849
Cash and cash equivalents at beginning of period	3,905	2,974
Cash and cash equivalents at end of period	4,422	3,823
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1,535)	(3,320)
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	169	687
Returns of contributed capital	(602)	(1,126)
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	(4,290)	83
Net change in short-term borrowings	0	0
Net increase in bank deposits	0	0
Proceeds from issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Net Change in Debt, Intercompany	3,728	(525)
Repurchase and Redemption of Preferred Stock	0
Dividends paid	0	0
Dividends paid and returns of contributed capital, Intercompany	2,137	4,447
Capital contributions from parent	(169)	(687)
Net cash provided by (used in) financing activities	5,696	3,235
Effect of exchange-rate changes on cash and cash equivalents	0
Cash and Cash Equivalents, Period Increase (Decrease)	(129)	(2)
Cash and cash equivalents at beginning of period	(615)	(410)
Cash and cash equivalents at end of period	(744)	(412)
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	2,598	(547)
Affiliated Entity [Member] | Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	0	0
Affiliated Entity [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	1,259	25
Affiliated Entity [Member] | Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	$ (3,857)	$ 522