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DESCRIPTION OF BUSINESS SEGMENTS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
May 31, 2025
Accounting Policies [Abstract]  
Schedule of Depreciable Lives and Net Book Value of Property and Equipment
The depreciable lives and net book value of our property and equipment are as follows (dollars in millions):
Net Book Value at May 31,
Range20252024
Wide-body aircraft and related equipment
18 to 30 years
$18,202 $17,936 
Narrow-body and feeder aircraft and related equipment
5 to 30 years
1,750 1,849 
Package handling and ground support equipment
3 to 15 years
7,573 7,607 
Information technology
3 to 7 years
1,568 1,722 
Vehicles and trailers
3 to 15 years
4,075 4,053 
Facilities and other
1 to 33 years
8,474 8,324 
Schedule of Obligations Confirmed and Paid A rollforward of obligations confirmed and paid during the years ended May 31 is presented below (in millions):
20252024
Confirmed obligations outstanding at the beginning of the year$94 $83 
Invoices confirmed during the year625 686 
Confirmed invoices paid during the year(651)(678)
Currency translation adjustments3 3 
Confirmed obligations outstanding at the end of the year$71 $94