Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jan. 23, 2021	Apr. 25, 2020
Assets:
Cash equivalents	$ 2,778	$ 3,391
DPP receivable - receivables securitization program	163,641	117,327
DPP receivable - customer financing	206,875	228,019
Derivative instruments	578	204
Total assets	373,872	348,941
Liabilities:
Derivative instruments	13,987	19,849
Fair Value, Inputs, Level 1
Assets:
Cash equivalents	2,778	3,391
DPP receivable - receivables securitization program	0	0
DPP receivable - customer financing	0	0
Derivative instruments	0	0
Total assets	2,778	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	578	204
Total assets	578	204
Liabilities:
Derivative instruments	13,987	19,849
Fair Value, Inputs, Level 3
Assets:
Cash equivalents	0	0
DPP receivable - receivables securitization program	163,641	117,327
DPP receivable - customer financing	206,875	228,019
Derivative instruments	0	0
Total assets	370,516	345,346
Liabilities:
Derivative instruments	$ 0	$ 0