Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease right-of-use assets, net of amortization	$ 613	$ 638
Other current liabilities	174	190
Long-term operating lease liabilities	459	470
Total operating lease liabilities	633	660
Finance leases, net of amortization (within property, plant and equipment)	233	252
Current portion of long-term debt	82	74
Long-term debt	157	182
Total finance lease liabilities	$ 239	$ 256
Operating leases, weighted average remaining lease term	6 years 7 months 6 days	6 years 3 months 18 days
Finance leases, weighted average remaining lease term	3 years 10 months 24 days	4 years 4 months 24 days
Operating leases, weighted average discount rate	3.30%	3.20%
Finance leases, weighted average discount rate	2.90%	3.20%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment, net	Property, plant and equipment, net
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current portion of long-term debt	Current portion of long-term debt
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt	Long-term debt