XML 73 R45.htm IDEA: XBRL DOCUMENT v3.10.0.1
Supplemental Cash Flow Information -Supplemental Cash Flow (Details) - USD ($)
$ in Millions
3 Months Ended
Aug. 31, 2018
Aug. 31, 2017
Supplemental Cash Flow Information [Abstract]    
Interest (net of capitalized interest) $ 203 $ 153
Income taxes 93 96
Income tax refunds received (3) (10)
Cash tax payments, net $ 90 $ 86