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Supplemental Cash Flow Information - Supplemental Cash Flow (Details) - USD ($)
$ in Millions
3 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Supplemental Cash Flow Information [Abstract]    
Interest (net of capitalized interest) $ 167 $ 154
Income taxes 70 139
Income tax refunds received (77) (36)
Cash tax (refunds)/payments, net $ (7) $ 103