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Commitments - Schedule of Purchase Commitments (Details)
$ in Millions
May 31, 2023
USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]  
2024 $ 2,451
2025 2,115
2026 1,008
2027 468
2028 349
Thereafter 1,706
Total 8,097
Aircraft And Related Equipment Commitments [Member]  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2024 1,710
2025 1,560
2026 580
2027 290
2028 256
Thereafter 1,656
Total 6,052
Other Commitments [Member]  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2024 741 [1]
2025 555 [1]
2026 428 [1]
2027 178 [1]
2028 93 [1]
Thereafter 50 [1]
Total $ 2,045 [1]
[1] Primarily information technology and advertising contracts.