Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Assets
Operating lease assets	$ 1,230	$ 1,340
Finance lease assets	260	317
Total leased assets	$ 1,490	$ 1,657
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other, net	Other, net
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, plant and equipment, net of accumulated depreciation of $21,318 and $19,886	Property, plant and equipment, net of accumulated depreciation of $21,318 and $19,886
Current
Operating	$ 268	$ 344
Finance	$ 16	$ 16
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Long-Term Debt and Lease Obligation, Current	Long-Term Debt and Lease Obligation, Current
Noncurrent
Operating	$ 1,040	$ 1,088
Finance	$ 215	$ 234
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other	Other
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	LONG-TERM DEBT	LONG-TERM DEBT
Total lease liabilities	$ 1,539	$ 1,682
Weighted-average remaining lease term (years)
Operating leases	8 years 2 months 12 days	7 years 8 months 12 days
Finance leases	11 years 3 months 18 days	12 years
Weighted-average discount rate
Operating leases	7.59%	5.98%
Finance leases	4.98%	4.96%