Contingencies and Commitments - Cash Flow Information Related to Leases (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	$ 42	$ 47	$ 47
Financing cash flows from finance leases	83	74	62
ROU assets obtained in exchange for new lease obligations:
Operating leases	$ 0	$ 23	$ 8