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Supplemental Cash Flow Information - Supplemental Cash Flow (Details) - USD ($)
$ in Millions
9 Months Ended
Feb. 28, 2025
Feb. 29, 2024
Supplemental Cash Flow Information [Abstract]    
Interest (net of capitalized interest) $ 582 $ 538
Income taxes 1,223 1,265
Income tax refunds received (26) (97)
Cash tax payments/(refunds), net $ 1,197 $ 1,168