Leases - Lease expenses (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 cost	$ 32	$ 31	$ 105	$ 99
Variable lease cost	10	12	42	36
Total operating lease cost	42	43	147	135
Finance lease cost	$ 3	$ 2	$ 7	$ 6