Customer Concentration and Revenue Information - Revenue Concentration Risk (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 28, 2023	Oct. 29, 2022	Oct. 28, 2023	Oct. 29, 2022
Concentration Risk
Contract revenues	$ 1,136,110	$ 1,042,423	$ 3,223,119	$ 2,890,996
Revenue Benchmark | Customer Concentration Risk
Concentration Risk
Contract revenues	$ 1,136,100	$ 1,042,400	$ 3,223,100	$ 2,891,000
% of Total	100.00%	100.00%	100.00%	100.00%
Revenue Benchmark | Customer Concentration Risk | AT&T Inc.
Concentration Risk
Contract revenues	$ 145,100	$ 258,200	$ 543,800	$ 751,500
% of Total	12.80%	24.80%	16.90%	26.00%
Revenue Benchmark | Customer Concentration Risk | Lumen Technologies
Concentration Risk
Contract revenues	$ 187,600	$ 142,900	$ 486,500	$ 373,300
% of Total	16.50%	13.60%	15.10%	12.90%
Revenue Benchmark | Customer Concentration Risk | Comcast Corporation
Concentration Risk
Contract revenues	$ 111,200	$ 108,800	$ 351,300	$ 331,900
% of Total	9.80%	10.40%	10.90%	11.50%
Revenue Benchmark | Customer Concentration Risk | Total other customers combined
Concentration Risk
Contract revenues	$ 692,200	$ 532,500	$ 1,841,500	$ 1,434,300
% of Total	60.90%	51.20%	57.10%	49.60%