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Commitments - Additional Information (Details)
$ in Millions
 3 Months Ended
Jun. 24, 2019
air-craft
Aug. 31, 2019
USD ($)
air-craft
Other Aircraft Commitments Disclosure [Abstract]    
Deposit and Progress Payments | $   $ 611
B767F [Member]    
Other Aircraft Commitments Disclosure [Abstract]    
Conditional Aircraft Commitments   5
Number of additional aircraft agreed to purchase options exercised 6  
Aircraft expected to be delivered, fiscal year 2022  
B777F [Member]    
Other Aircraft Commitments Disclosure [Abstract]    
Conditional Aircraft Commitments   6