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Leases - Summary of Future Minimum Lease Payments, Operating and Finance Leases (Details) - USD ($) $ in Millions	May 31, 2023	May 31, 2022
Schedule Of Future Minimum Lease Payments For Operating Leases And Finance Leases [Line Items]
2024	$ 2,997
2025	2,844
2026	2,547
2027	2,255
2028	1,954
Thereafter	9,708
Total lease payments	22,305
Less imputed interest	(3,752)
Present value of lease liability	18,553
Operating Leases
2024	2,893
2025	2,792
2026	2,501
2027	2,218
2028	1,917
Thereafter	8,501
Total lease payments	20,822
Less imputed interest	(3,069)
Present value of lease liability	17,753	$ 16,930
Finance Leases
2024	104
2025	52
2026	46
2027	37
2028	37
Thereafter	1,207
Total lease payments	1,483
Less imputed interest	(683)
Present value of lease liability	800	$ 468
Aircraft and Related Equipment [Member]
Operating Leases
2024	103
2025	84
2026	82
2027	81
2028	81
Thereafter	90
Total lease payments	521
Less imputed interest	(35)
Present value of lease liability	486
Facilities and Other [Member]
Operating Leases
2024	2,790
2025	2,708
2026	2,419
2027	2,137
2028	1,836
Thereafter	8,411
Total lease payments	20,301
Less imputed interest	(3,034)
Present value of lease liability	$ 17,267

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