Leases (Components of Lease Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease expense	$ 43	$ 46	$ 47
Other expenses associated with operating leases 1	60	51	50
Total lease expense	103	97	97
Related cash disbursements for operating leases	$ 49	$ 50	$ 50