Revenues - Schedule of Revenues Disaggregated by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 1,606	$ 1,186	$ 4,295	$ 3,622
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	1,410	1,031	3,657	3,136
U.K.
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	148	133	452	408
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 48	$ 22	$ 186	$ 78