Financing Receivables - Past Due (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Past Due Financing Receivable
Amortized Cost	$ 11,616	$ 13,640
Client Financing Receivables
Past Due Financing Receivable
Amortized Cost	11,051	12,397
Amortized Cost Not Accruing	168	205
Impaired financing receivables, related allowance	120	153
Client Financing Receivables | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	369	312
Amortized Cost > 90 Days and Accruing	204	112
Billed Invoices > 90 Days and Accruing	23	10
Client Financing Receivables | Americas
Past Due Financing Receivable
Amortized Cost	6,900	6,573
Amortized Cost Not Accruing	70	90
Client Financing Receivables | Americas | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	266	188
Amortized Cost > 90 Days and Accruing	197	100
Billed Invoices > 90 Days and Accruing	22	6
Client Financing Receivables | EMEA
Past Due Financing Receivable
Amortized Cost	2,731	3,793
Amortized Cost Not Accruing	81	95
Client Financing Receivables | EMEA | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	81	99
Amortized Cost > 90 Days and Accruing	1	7
Billed Invoices > 90 Days and Accruing	0	2
Client Financing Receivables | Asia Pacific
Past Due Financing Receivable
Amortized Cost	1,420	2,031
Amortized Cost Not Accruing	17	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	6	5
Billed Invoices > 90 Days and Accruing	$ 1	$ 2