Customer Concentration and Revenue Information - Trade Receivable Risk (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 27, 2024	Oct. 28, 2023	Jul. 29, 2023	Apr. 29, 2023	Jan. 28, 2023	Oct. 29, 2022	Jul. 30, 2022	Apr. 30, 2022	Jan. 27, 2024	Jan. 28, 2023	Jan. 29, 2022
Concentration Risk [Line Items]
Amount	$ 952,455	$ 1,136,110	$ 1,041,535	$ 1,045,474	$ 917,466	$ 1,042,423	$ 972,273	$ 876,300	$ 4,175,574	$ 3,808,462	$ 3,130,519
% of Total									100.00%	100.00%	100.00%
Customer Concentration Risk | Revenue Benchmark
Concentration Risk [Line Items]
Amount									$ 4,175,600	$ 3,808,500	$ 3,130,500
% of Total									100.00%	100.00%	100.00%
Telecommunications | Customer Concentration Risk | Revenue Benchmark
Concentration Risk [Line Items]
Amount									$ 3,743,300	$ 3,415,800	$ 2,777,600
% of Total									89.60%	89.70%	88.70%
Underground facility locating | Customer Concentration Risk | Revenue Benchmark
Concentration Risk [Line Items]
Amount									$ 295,300	$ 274,900	$ 255,400
% of Total									7.10%	7.20%	8.20%
Electrical and gas utilities and other | Customer Concentration Risk | Revenue Benchmark
Concentration Risk [Line Items]
Amount									$ 137,000	$ 117,800	$ 97,500
% of Total									3.30%	3.10%	3.10%