Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets
Operating lease assets	$ 1,340	$ 1,451
Finance lease assets	317	314
Total leased assets	$ 1,657	$ 1,765
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 $19,886 and $19,271	Property, plant and equipment, net of accumulated depreciation of $19,886 and $19,271
Current
Operating	$ 344	$ 385
Finance	$ 16	$ 19
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	$ 1,088	$ 1,171
Finance	$ 234	$ 251
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	$ 1,682	$ 1,826
Weighted-average remaining lease term (years)
Operating leases	7 years 8 months 12 days	6 years 9 months 18 days
Finance leases	12 years	13 years 1 month 6 days
Weighted-average discount rate
Operating leases	5.98%	5.54%
Finance leases	4.96%	4.89%