Leases (Components of Lease Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease expense	$ 46	$ 47	$ 49
Other expenses associated with operating leases 1	51	50	49
Total lease expense	97	97	98
Related cash disbursements for operating leases	50	50	$ 51
ROU assets related to new leases	$ 7	$ 1