Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jan. 25, 2020	Apr. 27, 2019
Assets:
Cash equivalents	$ 2,096	$ 19,529
DPP receivable - receivables securitization program	159,409	57,238
DPP receivable - customer financing	178,428	121,657
Derivative instruments	152	380
Total assets	340,085	198,804
Liabilities:
Derivative instruments	7,728	3,194
Fair Value, Inputs, Level 1
Assets:
Cash equivalents	2,096	19,529
DPP receivable - receivables securitization program	0	0
DPP receivable - customer financing	0	0
Derivative instruments	0	0
Total assets	2,096	19,529
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	152	380
Total assets	152	380
Liabilities:
Derivative instruments	7,728	3,194
Fair Value, Inputs, Level 3
Assets:
Cash equivalents	0	0
DPP receivable - receivables securitization program	159,409	57,238
DPP receivable - customer financing	178,428	121,657
Derivative instruments	0	0
Total assets	337,837	178,895
Liabilities:
Derivative instruments	$ 0	$ 0