Revenues - Schedule of Revenues Disaggregated by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 1,186	$ 1,068	$ 3,622	$ 3,231
U.S
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	1,031	941	3,136	2,857
U.K
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	133	106	408	309
Republic of Ireland
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	9	9	33	31
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	10	10	29	25
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 3	$ 2	$ 16	$ 9