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Reconciliation of Statutory Federal Income Tax Rate to Effective Consolidated Tax Rate (Detail)	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 30, 2018	Dec. 31, 2017	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Income Taxes [Line Items]
U.S. federal statutory income tax rate	21.00%	35.00%	30.40%	35.00%	35.00%
Non-deductible transaction costs					5.80%
Foreign tax rates differential			(2.30%)	(9.10%)	(2.80%)
COLI increase, net			(1.20%)	(1.50%)	(2.90%)
Conclusion of U.S. federal tax audit					(4.40%)
Transition tax			9.00%
Deferred tax remeasurement			(2.40%)
Non-deductible operating expenses			0.30%	0.60%	1.50%
Devaluation of Venezuelan currency					7.40%
Change in valuation allowance			(2.30%)	(3.10%)	(6.20%)
Change in uncertain tax positions			0.90%		1.30%
Foreign source income, net of credits generated			(0.10%)	(0.10%)	0.50%
Other			1.80%	3.30%	3.70%
Effective income tax rate			34.10%	25.10%	38.90%

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Percentage of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to increase (decrease) from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act of 2017.

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