Financing Receivables - By Portfolio Segment (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($) class	Dec. 31, 2022 USD ($) class
Financing receivables
Number of classes of financing receivable | class	3	3
Amortized cost	$ 11,821	$ 13,769
Allowance for credit losses:
Allowance for credit losses, beginning balance	173
Allowance for credit losses, ending balance	171	173
Client Financing Receivables
Financing receivables
Amortized cost	10,705	12,531
Allowance for credit losses:
Allowance for credit losses, beginning balance	168	195
Write-offs	(4)	(25)
Recoveries	1	5
Additions/(releases)	(6)	(3)
Other	7	(4)
Allowance for credit losses, ending balance	165	168
Client Financing Receivables | Americas
Financing receivables
Amortized cost	6,317	7,281
Allowance for credit losses:
Allowance for credit losses, beginning balance	88	111
Write-offs	(3)	(20)
Recoveries	0	1
Additions/(releases)	6	(5)
Other	7	2
Allowance for credit losses, ending balance	98	88
Client Financing Receivables | Europe/Middle East/Africa
Financing receivables
Amortized cost	3,019	3,546
Allowance for credit losses:
Allowance for credit losses, beginning balance	60	61
Write-offs	0	(3)
Recoveries	0	0
Additions/(releases)	(12)	6
Other	0	(5)
Allowance for credit losses, ending balance	48	60
Client Financing Receivables | Asia Pacific
Financing receivables
Amortized cost	1,370	1,704
Allowance for credit losses:
Allowance for credit losses, beginning balance	20	23
Write-offs	0	(2)
Recoveries	0	4
Additions/(releases)	0	(4)
Other	(1)	(2)
Allowance for credit losses, ending balance	$ 19	$ 20