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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 29, 2020
Feb. 28, 2019
Income Taxes [Line Items]        
Effective tax rate 25.00% 20.60% 18.50% 21.80%
Benefit from reduction of valuation allowance on tax loss carryforwards     $ 133 $ 90
Income tax benefit from accelerated deductions to be claimed on 2018 tax return       60
Netherlands [Member]        
Income Taxes [Line Items]        
Expense from the impact on deferred taxes attributable to a lower enacted tax rate       $ 50