Financing Receivables: (Details 5) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Gross recorded investment for each class of receivables, by credit quality indicator
Total	$ 23,335	$ 23,537
Major Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	16,507	17,325
Growth Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	6,828	6,212
Lease receivables
Gross recorded investment for each class of receivables, by credit quality indicator
Total	8,635	8,996
Lease receivables | Major Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	6,371	6,796
Lease receivables | Major Markets | AAA - AA-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	484	743
Lease receivables | Major Markets | A+ - A-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	931	1,513
Lease receivables | Major Markets | BBB+ - BBB-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	2,472	2,111
Lease receivables | Major Markets | BB+ - BB
Gross recorded investment for each class of receivables, by credit quality indicator
Total	1,380	1,393
Lease receivables | Major Markets | BB- - B+
Gross recorded investment for each class of receivables, by credit quality indicator
Total	692	595
Lease receivables | Major Markets | B - B-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	348	365
Lease receivables | Major Markets | CCC+ - D
Gross recorded investment for each class of receivables, by credit quality indicator
Total	64	76
Lease receivables | Growth Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	2,264	2,200
Lease receivables | Growth Markets | AAA - AA-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	75	68
Lease receivables | Growth Markets | A+ - A-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	147	168
Lease receivables | Growth Markets | BBB+ - BBB-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	947	957
Lease receivables | Growth Markets | BB+ - BB
Gross recorded investment for each class of receivables, by credit quality indicator
Total	387	350
Lease receivables | Growth Markets | BB- - B+
Gross recorded investment for each class of receivables, by credit quality indicator
Total	362	368
Lease receivables | Growth Markets | B - B-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	266	214
Lease receivables | Growth Markets | CCC+ - D
Gross recorded investment for each class of receivables, by credit quality indicator
Total	81	74
Loan receivables
Gross recorded investment for each class of receivables, by credit quality indicator
Total	14,700	14,542
Loan receivables | Major Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	10,136	10,529
Loan receivables | Major Markets | AAA - AA-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	770	1,151
Loan receivables | Major Markets | A+ - A-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	1,481	2,344
Loan receivables | Major Markets | BBB+ - BBB-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	3,933	3,271
Loan receivables | Major Markets | BB+ - BB
Gross recorded investment for each class of receivables, by credit quality indicator
Total	2,195	2,158
Loan receivables | Major Markets | BB- - B+
Gross recorded investment for each class of receivables, by credit quality indicator
Total	1,101	922
Loan receivables | Major Markets | B - B-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	554	565
Loan receivables | Major Markets | CCC+ - D
Gross recorded investment for each class of receivables, by credit quality indicator
Total	102	118
Loan receivables | Growth Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	4,565	4,012
Loan receivables | Growth Markets | AAA - AA-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	150	125
Loan receivables | Growth Markets | A+ - A-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	297	307
Loan receivables | Growth Markets | BBB+ - BBB-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	1,909	1,745
Loan receivables | Growth Markets | BB+ - BB
Gross recorded investment for each class of receivables, by credit quality indicator
Total	781	638
Loan receivables | Growth Markets | BB- - B+
Gross recorded investment for each class of receivables, by credit quality indicator
Total	729	672
Loan receivables | Growth Markets | B - B-
Gross recorded investment for each class of receivables, by credit quality indicator
Total	536	391
Loan receivables | Growth Markets | CCC+ - D
Gross recorded investment for each class of receivables, by credit quality indicator
Total	$ 163	$ 134