Leases - Schedule of Changes in Operating Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Lease, Liability [Abstract]
Lease liabilities, beginning balance	$ 361	$ 364
Liabilities assumed in exchange for new right-of-use assets (a)	232	149
Contract modifications (b)	0	(6)
Liabilities settled	(182)	(153)
Straight-line rent expense adjustment	(1)	0
Accretion of discount on operating leases (c)	13	7
Lease liabilities, ending balance	$ 423	$ 361
Finance Lease Liability [Abstract]
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other property and equipment, net	Other property and equipment, net	Other property and equipment, net
Lease liabilities, beginning balance	$ 521	$ 539
Liabilities assumed in exchange for new right-of-use assets (a)	0	0
Contract modifications (b)	0	0
Liabilities settled	(19)	(18)
Straight-line rent expense adjustment	0	0
Lease liabilities, ending balance	$ 502	$ 521
Operating lease, weighted average discount rate, percent	3.60%	2.50%
Finance lease, weighted average discount rate, percent	3.00%
Operating lease, weighted average remaining lease term	4 years	5 years
Finance lease, weighted average remaining lease term	16 years	17 years