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Reconciliation of Statutory Federal Income Tax Rate to Effective Consolidated Tax Rate (Detail)	12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2015
Income Taxes [Line Items]
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%
Non-deductible transaction costs		5.80%
Foreign tax rates differential	(9.10%)	(2.80%)	(4.20%)
COLI increase, net	(1.50%)	(2.90%)	(3.10%)
Conclusion of U.S. federal tax audit		(4.40%)
Non-deductible operating expenses	0.60%	1.50%	0.50%
Devaluation of Venezuelan currency		7.40%
Change in valuation allowance	(3.10%)	(6.20%)
Change in uncertain tax positions		1.30%	(0.10%)
Foreign source income, net of credits generated	(0.10%)	0.50%	0.40%
Other	3.30%	3.70%	(0.50%)
Effective income tax rate	25.10%	38.90%	28.00%

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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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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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