Leases - Lease expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Leases [Abstract]
Operating lease cost	$ 32	$ 40	$ 64	$ 73
Variable lease cost	12	16	28	32
Total operating lease cost	44	56	92	105
Finance lease cost	$ 3	$ 2	$ 6	$ 4