Commitments - Additional Information (Details) $ in Millions		12 Months Ended
	Jun. 22, 2021 air-craft	May 31, 2021 USD ($) air-craft
Other Aircraft Commitments Disclosure [Abstract]
Deposit and Progress Payments | $		$ 948
B777F [Member]
Other Aircraft Commitments Disclosure [Abstract]
Conditional Aircraft Commitments		6
B767F [Member] | Subsequent Event [Member]
Other Aircraft Commitments Disclosure [Abstract]
Number of additional aircraft agreed to purchase options exercised	20
B767F Aircraft Delivered in 2024 [Member] | Subsequent Event [Member]
Other Aircraft Commitments Disclosure [Abstract]
Number of aircrafts rescheduled delivery, 2024	10
Aircraft expected to be delivered, earliest fiscal year	2024
B767F Aircraft Delivered in 2025 [Member] | Subsequent Event [Member]
Other Aircraft Commitments Disclosure [Abstract]
Number of aircrafts rescheduled delivery, 2024	10
Aircraft expected to be delivered, latest fiscal year	2025