Financing Receivables: (Details 1) (USD $) In Millions, unless otherwise specified						6 Months Ended				6 Months Ended				6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014 Net investment in sales-type and direct financing leases	Dec. 31, 2013 Net investment in sales-type and direct financing leases	Jun. 30, 2014 Net investment in sales-type and direct financing leases Financing receivable, lower range of payment terms	Jun. 30, 2014 Net investment in sales-type and direct financing leases Financing receivable, upper range of payment terms	Jun. 30, 2014 Commercial financing receivables	Dec. 31, 2013 Commercial financing receivables	Jun. 30, 2014 Commercial financing receivables Financing receivable, lower range of payment terms	Jun. 30, 2014 Commercial financing receivables Financing receivable, upper range of payment terms	Jun. 30, 2014 Client loan and installment payment receivables	Dec. 31, 2013 Client loan and installment payment receivables	Jun. 30, 2014 Client loan and installment payment receivables Financing receivable, lower range of payment terms	Jun. 30, 2014 Client loan and installment payment receivables Financing receivable, upper range of payment terms
Financing receivables:
Financing receivables used as collateral for non-recourse borrowings	$ 671	$ 769
Financing receivables held for sale	0	0
Financing receivables, current
Financing receivables, net, current	18,620	19,787		4,131	4,004			7,064	8,541			7,425	7,243
Financing receivables, noncurrent
Financing receivables, net, noncurrent	12,140	12,755		5,170	5,700							6,969	7,055
Financing receivables
Financing receivable, payment terms						2 years	6 years			30 days	90 days			1 year	7 years
Sales-type and direct financing leases, unguaranteed residual value				730	737
Sales-type and direct financing leases, unearned income				612	672
Allowance for credit losses	$ 454	$ 365	$ 318	$ 149	$ 123			$ 18	$ 23			$ 306	$ 242