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Commitments - Additional Information (Details)
$ in Millions
 9 Months Ended
Feb. 28, 2025
USD ($)
Mar. 31, 2025
Option
Other Aircraft Commitments Disclosure [Abstract]    
Deposit and progress payments | $ $ 594  
Lessee Disclosure [Abstract]    
Additional leases not yet commenced, undiscounted future payments | $ $ 900  
Minimum [Member]    
Lessee Disclosure [Abstract]    
Operating lease commencement date 2025  
Maximum [Member]    
Lessee Disclosure [Abstract]    
Operating lease commencement date 2027  
B777F [Member]    
Lessee Disclosure [Abstract]    
Number of express exercised options will be delivered in 2026   3
Number of express exercised options to purchase   8
Number of express exercised options will be delivered in 2027   5