Financing Receivables (Details) (USD $) In Millions, unless otherwise specified					9 Months Ended				9 Months Ended				9 Months Ended				9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2011 Net investment in sales-type and direct financing leases	Dec. 31, 2010 Net investment in sales-type and direct financing leases	Sep. 30, 2011 Net investment in sales-type and direct financing leases Financing receivable, upper range of payment terms Y	Sep. 30, 2011 Net investment in sales-type and direct financing leases Financing receivable, lower range of payment terms Y	Sep. 30, 2011 Commercial financing receivables	Dec. 31, 2010 Commercial financing receivables	Sep. 30, 2011 Commercial financing receivables Financing receivable, upper range of payment terms D	Sep. 30, 2011 Commercial financing receivables Financing receivable, lower range of payment terms D	Sep. 30, 2011 Client loan receivables	Dec. 31, 2010 Client loan receivables	Sep. 30, 2011 Client loan receivables Financing receivable, upper range of payment terms Y	Sep. 30, 2011 Client loan receivables Financing receivable, lower range of payment terms Y	Sep. 30, 2011 Installment payment receivables	Dec. 31, 2010 Installment payment receivables	Sep. 30, 2011 Installment payment receivables Financing receivable, upper range of payment terms Y	Sep. 30, 2011 Installment payment receivables Financing receivable, lower range of payment terms Y
Financing receivables, current
Financing receivables, net, current	$ 14,145	$ 16,257	$ 3,834	$ 3,945			$ 5,027	$ 6,777			$ 4,531	$ 4,718			$ 754	$ 816
Financing receivables, noncurrent
Financing receivables, net, noncurrent	9,830	10,548	5,117	5,384			37	43			4,303	4,734			372	388
Financing receivables
Financing receivable, payment terms					6	2			90	30			7	2			3	2
Sales-type and direct financing leases, unguaranteed residual value			738	871
Sales-type and direct financing leases, unearned income			746	816
Sales-type and direct financing leases, credit losses			109	126			45	58			99	160			49	56
Financing receivables used as collateral for non-recourse borrowings	$ 307	$ 302