Financing Receivables - Past Due (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Past Due Financing Receivable
Amortized Cost	$ 12,721	$ 13,640
Client Financing Receivables
Past Due Financing Receivable
Amortized Cost	11,930	12,397
Amortized Cost Not Accruing	177	205
Impaired financing receivables, related allowance	129	153
Client Financing Receivables | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	324	312
Amortized Cost > 90 Days and Accruing	150	112
Billed Invoices > 90 Days and Accruing	15	10
Client Financing Receivables | Americas
Past Due Financing Receivable
Amortized Cost	7,092	6,573
Amortized Cost Not Accruing	76	90
Client Financing Receivables | Americas | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	216	188
Amortized Cost > 90 Days and Accruing	141	100
Billed Invoices > 90 Days and Accruing	11	6
Client Financing Receivables | EMEA
Past Due Financing Receivable
Amortized Cost	3,173	3,793
Amortized Cost Not Accruing	83	95
Client Financing Receivables | EMEA | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	85	99
Amortized Cost > 90 Days and Accruing	4	7
Billed Invoices > 90 Days and Accruing	1	2
Client Financing Receivables | Asia Pacific
Past Due Financing Receivable
Amortized Cost	1,666	2,031
Amortized Cost Not Accruing	18	20
Client Financing Receivables | Asia Pacific | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	23	25
Amortized Cost > 90 Days and Accruing	5	5
Billed Invoices > 90 Days and Accruing	$ 2	$ 2