Leases (Supplemental Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 61	$ 62	$ 53
Right-of-use assets obtained in exchange for operating liabilities:
Operating leases	27	43	$ 73
Right-of-use asset balance:
Operating leases	154	177
Lease liability balance:
Current operating leases	44	42
Long-term operating leases	107	133
Total operating leases	$ 151	$ 175
Operating lease (years)	4 years 1 month 6 days	4 years 10 months 24 days
Operating lease (Percent)	7.50%	7.32%