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REVENUE - Revenue by Major Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Revenue, Major Customer [Line Items]
Total revenue	$ 988,141	$ 976,712	$ 2,579,198	$ 2,703,677
Verizon | Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue	131,892			272,200
Web-scale provider | Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue	119,728
AT&T | Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue	119,199	114,963	313,140	304,645
Total | Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue	$ 370,819	$ 114,963	$ 313,140	$ 576,845

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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