Deferred Revenue - Schedule of Changes in Deferred Revenue (Details) - USD ($) $ in Millions	4 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Sep. 05, 2023
Disaggregation Of Revenue [Roll Forward]
Deferred revenue, beginning balance		$ 254	$ 284
Additions		1,068	1,041
Amortization		(1,015)	(1,071)
Deferred revenue, ending balance	$ 307	307	254
Black Knight, Inc.
Disaggregation Of Revenue [Roll Forward]
Additions	37
Listing Revenues
Disaggregation Of Revenue [Roll Forward]
Deferred revenue, beginning balance		115	112
Additions		490	518
Amortization		(497)	(515)
Deferred revenue, ending balance	108	108	115
Data Services and Other Revenues
Disaggregation Of Revenue [Roll Forward]
Deferred revenue, beginning balance		88	93
Additions		401	451
Amortization		(396)	(456)
Deferred revenue, ending balance	93	93	88
Mortgage Technology
Disaggregation Of Revenue [Roll Forward]
Deferred revenue, beginning balance		51	79
Additions		177	72
Amortization		(122)	(100)
Deferred revenue, ending balance	$ 106	$ 106	$ 51
Mortgage Technology | Black Knight, Inc.
Disaggregation Of Revenue [Roll Forward]
Deferred revenue acquired				$ 68