Financing Receivables - Credit Quality Indicators (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Troubled debt restructurings of financing receivables
Lease receivables | Americas
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		3,385
Lease receivables | Americas | Aaa - Aa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		465
Lease receivables | Americas | A1 - A3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		750
Lease receivables | Americas | Baa1 - Baa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		955
Lease receivables | Americas | Ba1 - Ba2
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		746
Lease receivables | Americas | Ba3 - B1
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		215
Lease receivables | Americas | B2 - B3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		242
Lease receivables | Americas | Caa - D
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		13
Lease receivables | EMEA
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		1,162
Lease receivables | EMEA | Aaa - Aa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		54
Lease receivables | EMEA | A1 - A3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		181
Lease receivables | EMEA | Baa1 - Baa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		409
Lease receivables | EMEA | Ba1 - Ba2
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		326
Lease receivables | EMEA | Ba3 - B1
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		140
Lease receivables | EMEA | B2 - B3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		50
Lease receivables | EMEA | Caa - D
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		2
Lease receivables | Asia Pacific
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		947
Lease receivables | Asia Pacific | Aaa - Aa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		43
Lease receivables | Asia Pacific | A1 - A3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		454
Lease receivables | Asia Pacific | Baa1 - Baa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		147
Lease receivables | Asia Pacific | Ba1 - Ba2
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		154
Lease receivables | Asia Pacific | Ba3 - B1
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		101
Lease receivables | Asia Pacific | B2 - B3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		47
Lease receivables | Asia Pacific | Caa - D
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		2
Loan receivables | Americas
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		6,638
Loan receivables | Americas | Aaa - Aa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		1,028
Loan receivables | Americas | A1 - A3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		1,186
Loan receivables | Americas | Baa1 - Baa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		1,882
Loan receivables | Americas | Ba1 - Ba2
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		1,513
Loan receivables | Americas | Ba3 - B1
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		471
Loan receivables | Americas | B2 - B3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		522
Loan receivables | Americas | Caa - D
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		36
Loan receivables | EMEA
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		3,871
Loan receivables | EMEA | Aaa - Aa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		193
Loan receivables | EMEA | A1 - A3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		395
Loan receivables | EMEA | Baa1 - Baa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		1,527
Loan receivables | EMEA | Ba1 - Ba2
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		921
Loan receivables | EMEA | Ba3 - B1
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		564
Loan receivables | EMEA | B2 - B3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		253
Loan receivables | EMEA | Caa - D
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		18
Loan receivables | Asia Pacific
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		2,376
Loan receivables | Asia Pacific | Aaa - Aa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		189
Loan receivables | Asia Pacific | A1 - A3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		892
Loan receivables | Asia Pacific | Baa1 - Baa3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		619
Loan receivables | Asia Pacific | Ba1 - Ba2
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		388
Loan receivables | Asia Pacific | Ba3 - B1
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		205
Loan receivables | Asia Pacific | B2 - B3
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		72
Loan receivables | Asia Pacific | Caa - D
Amortized cost/recorded investment for each class of receivables, by credit quality indicator
Amortized Cost/Recorded Investment		$ 10