XML 77 R46.htm IDEA: XBRL DOCUMENT v3.8.0.1
Supplemental Cash Flow Information -Supplemental Cash Flow (Details) - USD ($)
$ in Millions
9 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Supplemental Cash Flow Information [Abstract]    
Interest (net of capitalized interest) $ 430 $ 400
Income taxes 707 294
Income tax refunds received (59) (16)
Cash tax payments, net $ 648 $ 278