Financing Receivables - Credit Quality Indicators (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Lease receivables | Americas
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	$ 3,541	$ 3,776
Lease receivables | Americas | Aaa - Aa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	397	447
Lease receivables | Americas | A1 - A3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	703	782
Lease receivables | Americas | Baa1 - Baa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	699	772
Lease receivables | Americas | Ba1 - Ba2
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	776	822
Lease receivables | Americas | Ba3 - B1
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	547	574
Lease receivables | Americas | B2 - B3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	354	297
Lease receivables | Americas | Caa - D
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	65	83
Lease receivables | EMEA
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	1,150	1,167
Lease receivables | EMEA | Aaa - Aa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	48	51
Lease receivables | EMEA | A1 - A3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	99	113
Lease receivables | EMEA | Baa1 - Baa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	355	366
Lease receivables | EMEA | Ba1 - Ba2
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	355	350
Lease receivables | EMEA | Ba3 - B1
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	207	208
Lease receivables | EMEA | B2 - B3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	74	71
Lease receivables | EMEA | Caa - D
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	12	9
Lease receivables | Asia Pacific
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	1,267	1,259
Lease receivables | Asia Pacific | Aaa - Aa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	57	53
Lease receivables | Asia Pacific | A1 - A3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	550	486
Lease receivables | Asia Pacific | Baa1 - Baa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	313	330
Lease receivables | Asia Pacific | Ba1 - Ba2
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	180	185
Lease receivables | Asia Pacific | Ba3 - B1
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	88	106
Lease receivables | Asia Pacific | B2 - B3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	62	84
Lease receivables | Asia Pacific | Caa - D
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	17	15
Loan receivables | Americas
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	5,664	6,016
Loan receivables | Americas | Aaa - Aa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	635	712
Loan receivables | Americas | A1 - A3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	1,125	1,246
Loan receivables | Americas | Baa1 - Baa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	1,117	1,230
Loan receivables | Americas | Ba1 - Ba2
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	1,241	1,309
Loan receivables | Americas | Ba3 - B1
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	875	914
Loan receivables | Americas | B2 - B3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	566	472
Loan receivables | Americas | Caa - D
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	104	133
Loan receivables | EMEA
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	3,036	3,291
Loan receivables | EMEA | Aaa - Aa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	127	143
Loan receivables | EMEA | A1 - A3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	261	318
Loan receivables | EMEA | Baa1 - Baa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	937	1,032
Loan receivables | EMEA | Ba1 - Ba2
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	937	987
Loan receivables | EMEA | Ba3 - B1
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	546	585
Loan receivables | EMEA | B2 - B3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	197	201
Loan receivables | EMEA | Caa - D
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	32	25
Loan receivables | Asia Pacific
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	2,096	2,154
Loan receivables | Asia Pacific | Aaa - Aa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	95	90
Loan receivables | Asia Pacific | A1 - A3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	910	832
Loan receivables | Asia Pacific | Baa1 - Baa3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	517	565
Loan receivables | Asia Pacific | Ba1 - Ba2
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	297	316
Loan receivables | Asia Pacific | Ba3 - B1
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	146	182
Loan receivables | Asia Pacific | B2 - B3
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	103	143
Loan receivables | Asia Pacific | Caa - D
Net recorded investment for each class of receivables, by credit quality indicator
Financing receivables, net recorded investment	$ 28	$ 25