Lease Commitments - Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease costs	$ 2,359	$ 2,199	$ 2,551
Finance lease costs	57	66	45
Total lease costs	$ 2,416	$ 2,265	$ 2,596