Revenue from Contracts with Customers - Narrative (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2023 USD ($) line_of_business	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of lines of business		2	2
Deferred revenue	$ 135	$ 135	$ 135	$ 135	$ 150	$ 138
Amount of deferred revenue recognized	$ 64			$ 103
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenue, remaining performance obligation, percentage	50.00%	50.00%	50.00%	50.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 | Software License Sales & SaaS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Remaining performance obligation	$ 1,500	$ 1,500	$ 1,500	$ 1,500
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years)	3 years	3 years	3 years	3 years
Accrued Interest and Fees Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables related to contracts with customers	$ 2,870	$ 2,870	$ 2,870	$ 2,870		$ 2,630