Financing Receivables - By Portfolio Segment (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($) item
Financing receivables
Number of classes of financing receivable | item	3	3
Amortized Cost	$ 11,891.0	$ 13,769.0
Allowance for credit losses:
Allowance for credit losses, beginning balance	173.0
Allowance for credit losses, ending balance	164.0	173.0
Client Financing Receivables
Financing receivables
Amortized Cost	11,037.0	12,531.0
Allowance for credit losses:
Allowance for credit losses, beginning balance	168.0	195.0
Write-offs	0.0	(25.0)
Recoveries	0.0	5.0
Additions/(releases)	(13.0)	(3.0)
Other	4.0	(4.0)
Allowance for credit losses, ending balance	159.0	168.0
Client Financing Receivables | Americas
Financing receivables
Amortized Cost	6,394.0	7,281.0
Allowance for credit losses:
Allowance for credit losses, beginning balance	88.0	111.0
Write-offs	0.0	(20.0)
Recoveries		1.0
Additions/(releases)	0.0	(5.0)
Other	4.0	2.0
Allowance for credit losses, ending balance	93.0	88.0
Client Financing Receivables | EMEA
Financing receivables
Amortized Cost	3,082.0	3,546.0
Allowance for credit losses:
Allowance for credit losses, beginning balance	60.0	61.0
Write-offs	0.0	(3.0)
Recoveries	0.0	0.0
Additions/(releases)	(13.0)	6.0
Other	0.0	(5.0)
Allowance for credit losses, ending balance	47.0	60.0
Client Financing Receivables | Asia Pacific
Financing receivables
Amortized Cost	1,561.0	1,704.0
Allowance for credit losses:
Allowance for credit losses, beginning balance	20.0	23.0
Write-offs		(2.0)
Recoveries	0.0	4.0
Additions/(releases)	(1.0)	(4.0)
Other	0.0	(2.0)
Allowance for credit losses, ending balance	$ 19.0	$ 20.0