Leases (Schedule of Maturities of Operating and Financing Leases) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Lessee, operating lease, liability, payments, due next twelve months	$ 171
Finance lease, liability, payments, due next twelve months	14
Lease liability, payments, due next twelve months	185
Lessee, operating lease, liability, payments, due year two	127
Finance lease, liability, payments, due year two	12
Lease liability, payments, due year two	139
Lessee, operating lease, liability, payments, due year three	89
Finance lease, liability, payments, due year three	11
Lease liability, payments due, year three	100
Lessee, operating lease, liability, payments, due year four	60
Finance lease, liability, payments, due year four	10
Lease liability, payments, due year four	70
Lessee, operating lease, liability, payments, due year five	33
Finance lease, liability, payments, due year five	8
Lease liability, payments, due year five	41
Lessee, operating lease, liability, payments, due after year five	31
Finance lease, liability, payments, due after year five	14
Lease liability payments, due after year five	45
Operating lease, liability, payment, due	511
Finance lease, liability, payment, due	69
Lease liability, payments, total	580
Lessee, operating lease, liability, undiscounted excess amount	46
Lessee, finance lease, liability, undiscounted excess amount	14
Lease liability, undiscounted excess amount	60
Operating lease liability	465
Finance lease liability	55	$ 59
Total lease liabilities	$ 520	$ 489