Leases - Lease costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lease cost
Operating lease cost	$ 184	$ 162	$ 145
Finance lease cost:
Amortization of right of use assets	46	17	9
Interest on lease liabilities	6	5	4
Variable lease cost	18	20	8
Short-term lease cost	13	27	25
Sublease income	(6)	(8)	(6)
Total lease cost	$ 261	$ 223	$ 185