Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jul. 25, 2020	Apr. 25, 2020
Assets:
Cash equivalents	$ 2,609	$ 3,391
DPP receivable - receivables securitization program	155,563	117,327
DPP receivable - customer financing	252,178	228,019
Derivative instruments	160	204
Total assets	410,510	348,941
Liabilities:
Derivative instruments	18,173	19,849
Fair Value, Inputs, Level 1
Assets:
Cash equivalents	2,609	3,391
DPP receivable - receivables securitization program	0	0
DPP receivable - customer financing	0	0
Derivative instruments	0	0
Total assets	2,609	3,391
Liabilities:
Derivative instruments	0	0
Fair Value, Inputs, Level 2
Assets:
Cash equivalents	0	0
DPP receivable - receivables securitization program	0	0
DPP receivable - customer financing	0	0
Derivative instruments	160	204
Total assets	160	204
Liabilities:
Derivative instruments	18,173	19,849
Fair Value, Inputs, Level 3
Assets:
Cash equivalents	0	0
DPP receivable - receivables securitization program	155,563	117,327
DPP receivable - customer financing	252,178	228,019
Derivative instruments	0	0
Total assets	407,741	345,346
Liabilities:
Derivative instruments	$ 0	$ 0