XML 69 R41.htm IDEA: XBRL DOCUMENT v3.10.0.1
Commitments - Additional Information (Details)
$ in Millions
 3 Months Ended
Aug. 31, 2018
USD ($)
air-craft
Other Aircraft Commitments Disclosure [Abstract]  
Boeing 767F Conditional Aircraft Commitments 5
Boeing 777F Conditional Aircraft Commitments 6
Deposit and Progress Payments | $ $ 992
Additional B777F [Member]  
Other Aircraft Commitments Disclosure [Abstract]  
Boeing 777F Conditional Aircraft Commitments 6
Number of aircraft agreed to purchase 12
Aircraft expected to be delivered, earliest fiscal year 2021
Aircraft expected to be delivered, latest fiscal year 2025
Additional B767F [Member]  
Other Aircraft Commitments Disclosure [Abstract]  
Boeing 767F Conditional Aircraft Commitments 1
Number of aircraft agreed to purchase 12
Aircraft expected to be delivered, earliest fiscal year 2020
Aircraft expected to be delivered, latest fiscal year 2022
B777F Aircraft from 2020 to 2019 [Member]  
Other Aircraft Commitments Disclosure [Abstract]  
Aircraft expected to be delivered, earliest fiscal year 2019
Aircraft expected to be delivered, latest fiscal year 2020
Accelerate Delivery of Boeing 777F Conditional Aircraft Commitments 1
B767F Aircraft from 2020 to 2019 [Member]  
Other Aircraft Commitments Disclosure [Abstract]  
Aircraft expected to be delivered, earliest fiscal year 2019
Aircraft expected to be delivered, latest fiscal year 2020
Accelerate delivery of Boeing 767F conditional aircraft commitments 1
B777F [Member]  
Other Aircraft Commitments Disclosure [Abstract]  
Number of non conditional aircrafts 3
Aircraft expected to be delivered, earliest fiscal year 2019
Aircraft expected to be delivered, latest fiscal year 2025
Number of aircrafts scheduled for delivery 23
Number of aircrafts delivered 1
Additional maximum number of aircraft, options to purchase 14
Number of aircrafts rescheduled delivery 11
Number of aircraft total options to purchase 25
Aircraft expected to be delivered, through fiscal year 2028
B767F [Member]  
Other Aircraft Commitments Disclosure [Abstract]  
Aircraft expected to be delivered, earliest fiscal year 2019
Aircraft expected to be delivered, latest fiscal year 2023
Number of aircrafts scheduled for delivery 64
Number of aircrafts delivered 5
Additional maximum number of aircraft, options to purchase 6
Number of aircraft total options to purchase 50
Aircraft expected to be delivered, through fiscal year 2026