Leasing Arrangements - Schedule of Lease Liability Maturity (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Leases
2022	$ 4,383
2023	4,169
2024	3,908
2025	3,521
2026	3,173
Thereafter	12,335
Total lease payments	31,489
Less interest	4,427
Present value of lease liabilities	27,062
Less current obligation	3,859	$ 3,485
Long-term obligation at December 31, 2021	23,203	18,000
Finance Leases
2022	402
2023	344
2024	275
2025	155
2026	150
Thereafter	69
Total lease payments	1,395
Less interest	70
Total Finance lease liabilities	1,325	1,284
Less current obligation	400	368
Long-term obligation at December 31, 2021	$ 925	$ 916