Leases - Supplemental balance sheet information (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Operating Lease, Assets And Liabilities, Lessee [Abstract]
Operating lease right of use assets	$ 759	$ 829
Less: Current obligations	225	261
Noncurrent liability	$ 534	$ 580
Weighted average remaining lease term (in years):	5 years 4 months 24 days	5 years 6 months
Weighted average discount rate:	2.90%	2.20%