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Supplemental Cash Flow Information
 9 Months Ended
Feb. 29, 2016
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information

(7) Supplemental Cash Flow Information

 

Cash paid for interest expense and income taxes for the nine-month periods ended February 29, 2016 and February 28, 2015 was as follows (in millions):

   2016 2015
        
Cash payments for:     
        
 Income taxes$ 537 $ 428
 Income tax refunds received  (364)   (214)
 Cash tax payments, net$ 173 $ 214