Annual report pursuant to Section 13 and 15(d)

Reconciliation of Statutory Federal Income Tax Rate to Effective Consolidated Tax Rate (Detail)

v3.7.0.1
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%