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Commitments - Schedule of Purchase Commitments (Details)
$ in Millions
May 31, 2022
USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]  
2023 $ 2,951
2024 2,591
2025 1,894
2026 839
2027 478
Thereafter 2,076
Total 10,829
Aircraft And Related Equipment Commitments [Member]  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2023 1,986
2024 1,927
2025 1,404
2026 418
2027 306
Thereafter 1,948
Total 7,989
Other Commitments [Member]  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2023 965 [1]
2024 664 [1]
2025 490 [1]
2026 421 [1]
2027 172 [1]
Thereafter 128 [1]
Total $ 2,840 [1]
[1] Primarily equipment and advertising contracts.