Leases - Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lease Cost
Operating lease expense	$ 63	$ 59	$ 58
Variable operating lease expense	26	27	26
Short term lease expense	3	3	4
Lease expense	$ 92	$ 89	$ 88