Financing Receivables - Past Due (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Past Due Financing Receivable
Amortized Cost	$ 11,891.0	$ 13,769.0
Client Financing Receivables
Past Due Financing Receivable
Amortized Cost	11,037.0	12,531.0
Amortized Cost Not Accruing	124.0	137.0
Impaired financing receivables, related allowance	121.0	122.0
Client Financing Receivables | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	257.0	344.0
Amortized Cost > 90 Days and Accruing	133.0	208.0
Billed Invoices > 90 Days and Accruing	33.0	23.0
Client Financing Receivables | Americas
Past Due Financing Receivable
Amortized Cost	6,394.0	7,281.0
Amortized Cost Not Accruing	76.0	74.0
Client Financing Receivables | Americas | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	183.0	272.0
Amortized Cost > 90 Days and Accruing	107.0	198.0
Billed Invoices > 90 Days and Accruing	15.0	22.0
Client Financing Receivables | EMEA
Past Due Financing Receivable
Amortized Cost	3,082.0	3,546.0
Amortized Cost Not Accruing	32.0	46.0
Client Financing Receivables | EMEA | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	47.0	52.0
Amortized Cost > 90 Days and Accruing	16.0	8.0
Billed Invoices > 90 Days and Accruing	16.0	1.0
Client Financing Receivables | Asia Pacific
Past Due Financing Receivable
Amortized Cost	1,561.0	1,704.0
Amortized Cost Not Accruing	17.0	17.0
Client Financing Receivables | Asia Pacific | Total Past Due > 90 days
Past Due Financing Receivable
Amortized Cost	26.0	20.0
Amortized Cost > 90 Days and Accruing	9.0	3.0
Billed Invoices > 90 Days and Accruing	$ 3.0	$ 1.0