Financing Receivables - Past Due (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Past Due Financing Receivable
Total Recorded Investment	$ 19,700	$ 31,153
Total Lease Receivable and Loan Receivable Portfolio Segments
Past Due Financing Receivable
Total Recorded Investment	16,752	19,301
Recorded Investment Not Accruing	274	300
Recorded investment, impaired financing receivables with related allowance	229	249
Impaired financing receivables, related allowance	202	219
Total Lease Receivable and Loan Receivable Portfolio Segments | Total Past Due > 90 days
Past Due Financing Receivable
Recorded Investment > 90 Days	572	782
Recorded Investment > 90 Days and Accruing	323	494
Billed Invoices > 90 Days and Accruing	50	52
Total Lease Receivable and Loan Receivable Portfolio Segments | Americas
Past Due Financing Receivable
Total Recorded Investment	9,178	10,644
Total Lease Receivable and Loan Receivable Portfolio Segments | EMEA
Past Due Financing Receivable
Total Recorded Investment	4,257	5,016
Total Lease Receivable and Loan Receivable Portfolio Segments | Asia Pacific
Past Due Financing Receivable
Total Recorded Investment	3,317	3,641
Lease receivables
Past Due Financing Receivable
Total Recorded Investment	5,337	6,320
Recorded Investment Not Accruing	74	97
Lease receivables | Total Past Due > 90 days
Past Due Financing Receivable
Recorded Investment > 90 Days	284	385
Recorded Investment > 90 Days and Accruing	215	292
Billed Invoices > 90 Days and Accruing	18	24
Lease receivables | Americas
Past Due Financing Receivable
Total Recorded Investment	3,279	3,827
Recorded Investment Not Accruing	37	57
Lease receivables | Americas | Total Past Due > 90 days
Past Due Financing Receivable
Recorded Investment > 90 Days	213	310
Recorded Investment > 90 Days and Accruing	179	256
Billed Invoices > 90 Days and Accruing	13	19
Lease receivables | EMEA
Past Due Financing Receivable
Total Recorded Investment	1,096	1,341
Recorded Investment Not Accruing	19	16
Lease receivables | EMEA | Total Past Due > 90 days
Past Due Financing Receivable
Recorded Investment > 90 Days	34	25
Recorded Investment > 90 Days and Accruing	17	9
Billed Invoices > 90 Days and Accruing	3	1
Lease receivables | Asia Pacific
Past Due Financing Receivable
Total Recorded Investment	961	1,152
Recorded Investment Not Accruing	18	24
Lease receivables | Asia Pacific | Total Past Due > 90 days
Past Due Financing Receivable
Recorded Investment > 90 Days	37	49
Recorded Investment > 90 Days and Accruing	19	27
Billed Invoices > 90 Days and Accruing	2	3
Loan receivables
Past Due Financing Receivable
Total Recorded Investment	11,415	12,981
Recorded Investment Not Accruing	200	203
Loan receivables | Total Past Due > 90 days
Past Due Financing Receivable
Recorded Investment > 90 Days	288	397
Recorded Investment > 90 Days and Accruing	108	202
Billed Invoices > 90 Days and Accruing	31	29
Loan receivables | Americas
Past Due Financing Receivable
Total Recorded Investment	5,899	6,817
Recorded Investment Not Accruing	108	99
Loan receivables | Americas | Total Past Due > 90 days
Past Due Financing Receivable
Recorded Investment > 90 Days	155	259
Recorded Investment > 90 Days and Accruing	64	166
Billed Invoices > 90 Days and Accruing	10	24
Loan receivables | EMEA
Past Due Financing Receivable
Total Recorded Investment	3,161	3,675
Recorded Investment Not Accruing	67	73
Loan receivables | EMEA | Total Past Due > 90 days
Past Due Financing Receivable
Recorded Investment > 90 Days	93	98
Recorded Investment > 90 Days and Accruing	28	25
Billed Invoices > 90 Days and Accruing	15	3
Loan receivables | Asia Pacific
Past Due Financing Receivable
Total Recorded Investment	2,356	2,489
Recorded Investment Not Accruing	26	31
Loan receivables | Asia Pacific | Total Past Due > 90 days
Past Due Financing Receivable
Recorded Investment > 90 Days	41	40
Recorded Investment > 90 Days and Accruing	16	11
Billed Invoices > 90 Days and Accruing	$ 6	$ 1