Leasing (Lease, Cost) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Operating lease expense	$ 7	$ 8	$ 21	$ 25
Variable lease expense	1	1	3	3
Total lease expense, net	$ 8	$ 9	$ 24	$ 28