Leases - Lease activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease expense included in other expenses	$ 41	$ 36	$ 36
Sublease income	0	0	(2)
Total lease expense, net of sublease income	$ 41	$ 36	$ 34