Accounts Receivable Concentration Risk (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 28, 2018	Apr. 29, 2017	Jan. 27, 2018
Concentration Risk
Accounts Receivable, Net, Current	$ 644,980		$ 318,684
Concentration risk percentage	100.00%	100.00%
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | Comcast Corporation
Concentration Risk
Accounts Receivable, Net, Current	$ 164,200		$ 166,500
Concentration risk percentage	22.20%		24.50%
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | Verizon Communications Inc.
Concentration Risk
Accounts Receivable, Net, Current	$ 156,500		$ 98,200
Concentration risk percentage	21.10%		14.40%
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | CenturyLink, Inc.
Concentration Risk
Accounts Receivable, Net, Current	$ 120,300		$ 126,000
Concentration risk percentage	16.30%		18.50%
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | AT&T Inc.
Concentration Risk
Accounts Receivable, Net, Current	$ 102,800		$ 79,200
Concentration risk percentage	13.90%		11.60%