Customer Concentration and Revenue Information - Revenue Concentration Risk (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 29, 2022	Oct. 30, 2021	Oct. 29, 2022	Oct. 30, 2021
Concentration Risk
Contract revenues	$ 1,042,423	$ 853,973	$ 2,890,996	$ 2,369,038
Revenue Benchmark | Customer Concentration Risk
Concentration Risk
Contract revenues	$ 1,042,400	$ 854,000	$ 2,891,000	$ 2,369,000
% of Total	100.00%	100.00%	100.00%	100.00%
Revenue Benchmark | Customer Concentration Risk | AT&T Inc.
Concentration Risk
Contract revenues	$ 258,200	$ 199,500	$ 751,500	$ 532,600
% of Total	24.80%	23.40%	26.00%	22.50%
Revenue Benchmark | Customer Concentration Risk | Lumen Technologies
Concentration Risk
Contract revenues	$ 142,900	$ 103,000	$ 373,300	$ 284,200
% of Total	13.60%	12.10%	12.90%	12.00%
Revenue Benchmark | Customer Concentration Risk | Comcast Corporation
Concentration Risk
Contract revenues	$ 108,800	$ 121,000	$ 331,900	$ 373,800
% of Total	10.40%	14.20%	11.50%	15.80%
Revenue Benchmark | Customer Concentration Risk | Verizon Communications Inc.
Concentration Risk
Contract revenues	$ 94,900	$ 93,400	$ 256,800	$ 275,700
% of Total	9.10%	10.90%	8.90%	11.60%
Revenue Benchmark | Customer Concentration Risk | Total other customers combined
Concentration Risk
Contract revenues	$ 437,600	$ 337,100	$ 1,177,500	$ 902,700
% of Total	42.10%	39.40%	40.70%	38.10%