v3.26.1
RELATED PARTY TRANSACTIONS - Schedule of Net Transfers to Parent (Details) - USD ($)
$ in Millions
 12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Related Party Transaction [Line Items]      
Total net transfers to Parent per Consolidated Statements of Changes in Equity [1] $ (3,549) $ (1,073) $ (1,121)
Payments To Parent, Net, Financing Activities (3,910) (1,077) (1,125)
Related Party      
Related Party Transaction [Line Items]      
Total net transfers to Parent per Consolidated Statements of Changes in Equity (3,549) (1,073) (1,121)
Payments To Parent, Net, Financing Activities (3,910) (1,077) (1,125)
Cash pooling and general financing activities / other | Related Party      
Related Party Transaction [Line Items]      
Total net transfers to Parent per Consolidated Statements of Changes in Equity 16 (1,102) (1,185)
Transfer of net assets from FedEx, net | Related Party      
Related Party Transaction [Line Items]      
Total net transfers to Parent per Consolidated Statements of Changes in Equity 357 0 0
Payments To Parent, Net, Financing Activities (357) 0 0
Cash distribution to FedEx | Related Party      
Related Party Transaction [Line Items]      
Total net transfers to Parent per Consolidated Statements of Changes in Equity (4,122) 0 0
Corporate and other allocations | Related Party      
Related Party Transaction [Line Items]      
Total net transfers to Parent per Consolidated Statements of Changes in Equity 54 36 12
Income taxes | Related Party      
Related Party Transaction [Line Items]      
Total net transfers to Parent per Consolidated Statements of Changes in Equity 146 (7) 52
Stock-based compensation – equity-classified awards | Related Party      
Related Party Transaction [Line Items]      
Payments To Parent, Net, Financing Activities $ (4) $ (4) $ (4)
[1] Refer to Note 10, Related Party Transactions, for additional information on Net transfers from (to) Parent.