Financing Receivables (Details 5) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Gross recorded investment for each class of receivables, by credit quality indicator
Total	$ 18,409	$ 19,625
Lease receivables
Gross recorded investment for each class of receivables, by credit quality indicator
Total	8,225	8,545
Lease receivables | Major Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	6,290	6,562
Lease receivables | Major Markets | Aaa - Aa3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	810	794
Lease receivables | Major Markets | A1 - A3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	1,357	1,463
Lease receivables | Major Markets | Baa1 - Baa3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	2,296	2,494
Lease receivables | Major Markets | Ba1 - Ba2
Gross recorded investment for each class of receivables, by credit quality indicator
Total	944	899
Lease receivables | Major Markets | Ba3 - B1
Gross recorded investment for each class of receivables, by credit quality indicator
Total	548	518
Lease receivables | Major Markets | B2 - B3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	230	230
Lease receivables | Major Markets | Caa - D
Gross recorded investment for each class of receivables, by credit quality indicator
Total	105	164
Lease receivables | Growth Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	1,935	1,983
Lease receivables | Growth Markets | Aaa - Aa3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	151	173
Lease receivables | Growth Markets | A1 - A3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	188	182
Lease receivables | Growth Markets | Baa1 - Baa3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	738	837
Lease receivables | Growth Markets | Ba1 - Ba2
Gross recorded investment for each class of receivables, by credit quality indicator
Total	471	403
Lease receivables | Growth Markets | Ba3 - B1
Gross recorded investment for each class of receivables, by credit quality indicator
Total	259	242
Lease receivables | Growth Markets | B2 - B3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	109	93
Lease receivables | Growth Markets | Caa - D
Gross recorded investment for each class of receivables, by credit quality indicator
Total	19	54
Client loan receivables
Gross recorded investment for each class of receivables, by credit quality indicator
Total	10,184	11,080
Client loan receivables | Major Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	8,105	9,087
Client loan receivables | Major Markets | Aaa - Aa3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	1,043	1,100
Client loan receivables | Major Markets | A1 - A3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	1,748	2,026
Client loan receivables | Major Markets | Baa1 - Baa3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	2,958	3,453
Client loan receivables | Major Markets | Ba1 - Ba2
Gross recorded investment for each class of receivables, by credit quality indicator
Total	1,217	1,245
Client loan receivables | Major Markets | Ba3 - B1
Gross recorded investment for each class of receivables, by credit quality indicator
Total	706	718
Client loan receivables | Major Markets | B2 - B3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	297	318
Client loan receivables | Major Markets | Caa - D
Gross recorded investment for each class of receivables, by credit quality indicator
Total	135	227
Client loan receivables | Growth Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	2,079	1,993
Client loan receivables | Growth Markets | Aaa - Aa3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	162	173
Client loan receivables | Growth Markets | A1 - A3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	202	183
Client loan receivables | Growth Markets | Baa1 - Baa3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	793	841
Client loan receivables | Growth Markets | Ba1 - Ba2
Gross recorded investment for each class of receivables, by credit quality indicator
Total	506	405
Client loan receivables | Growth Markets | Ba3 - B1
Gross recorded investment for each class of receivables, by credit quality indicator
Total	278	243
Client loan receivables | Growth Markets | B2 - B3
Gross recorded investment for each class of receivables, by credit quality indicator
Total	117	94
Client loan receivables | Growth Markets | Caa - D
Gross recorded investment for each class of receivables, by credit quality indicator
Total	20	54
Major Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	14,395	15,650
Growth Markets
Gross recorded investment for each class of receivables, by credit quality indicator
Total	$ 4,014	$ 3,975