Leases Lessee Finance Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finance Lease, Right-of-Use Asset, Depreciation	$ 200	$ 211
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization	2,500	2,300
Property, Plant and Equipment [Member]
Gross amount of finance lease ROU asset	$ 4,300	$ 4,400