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Income Taxes - Reconciliation of the Effective Income Tax Rate (Details)

3 Months Ended

9 Months Ended

Feb. 28, 2018

Feb. 28, 2017

Feb. 28, 2018

Feb. 28, 2017

Income Tax Disclosure [Abstract]

Effective Tax Rate

(137.30%)

37.50%

(15.00%)

36.60%

Remeasurement of net U.S. deferred tax liability

(131.50%)

(38.40%)

Effect of February 2018 pension contribution

^[1]

(23.30%)

(6.80%)

Lower statutory tax rate

(18.90%)

(5.50%)

Transition tax

(4.10%)

(1.20%)

Other

^[2]

3.00%

0.30%

[1]	The benefit is from the pension contribution deducted on our 2017 tax return at a tax rate of 35%.
[2]	The 2018 tax rates were negatively impacted by the effect of the NotPetya cyberattack, changes in uncertain tax positions and tax rate impacts on changes in deferred tax items after the TCJA enactment and were favorably impacted from foreign tax credits associated with a second quarter dividend from foreign operations.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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