Revenue from Contracts with Customers - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) line_of_business	Dec. 31, 2023 USD ($) reporting_segment	Dec. 31, 2023 USD ($) reportable_segment	Dec. 31, 2023 USD ($)	Dec. 31, 2021 reportable_segment	Dec. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of lines of business	2	2	2		2
Contract with customer, liability	$ 133	$ 133	$ 133	$ 133		$ 138
Revenue recognized				$ 122
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Accounts, Notes, Loans and Financing Receivable [Line Items]
Remaining performance obligation, percentage	50.00%	50.00%	50.00%	50.00%
Software License Sales & SaaS | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenue, remaining performance obligation, amount	$ 1,520	$ 1,520	$ 1,520	$ 1,520
Revenue, remaining performance obligation, expected timing of satisfaction, period	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	$ 2,720	$ 2,720	$ 2,720	$ 2,720		$ 2,630