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Supplemental Cash Flow Information - Supplemental Cash Flow (Details) - USD ($)
$ in Millions
9 Months Ended
Feb. 29, 2024
Feb. 28, 2023
Supplemental Cash Flow Information [Abstract]    
Interest (net of capitalized interest) $ 538 $ 497
Income taxes 1,265 823
Income tax refunds received (97) (50)
Cash tax (refunds)/payments, net $ 1,168 $ 773