Accumulated Other Comprehensive Loss ("AOCL") - Summary of Accumulated Other Comprehensive Loss (Detail) $ in Thousands	9 Months Ended
	Jan. 27, 2018 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCL Beginning Balance	$ 1,394,433
AOCL Ending Balance	1,462,990
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCL Beginning Balance	(14,989)
Other comprehensive loss before reclassifications	0
Amounts reclassified from AOCL	1,312
AOCL Ending Balance	(13,677)
Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCL Beginning Balance	(77,680)
Other comprehensive loss before reclassifications	24,594
Amounts reclassified from AOCL	0
AOCL Ending Balance	(53,086)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCL Beginning Balance	(92,669)
Other comprehensive loss before reclassifications	24,594
Amounts reclassified from AOCL	1,312
AOCL Ending Balance	$ (66,763)