Revenue Recognition	9 Months Ended
Aug. 04, 2018
Revenue Recognition [Abstract]
Revenue Recognition	Revenue Recognition Revenue from product sales to customers is generally recognized when title passes, which is upon shipment in the U.S. and in certain foreign countries. Revenue from product sales to customers in other foreign countries is recognized subsequent to product shipment. Title for shipments to these other foreign countries ordinarily passes within a week of shipment. Accordingly, the Company defers the revenue recognized relating to these other foreign countries until title has passed. For multiple element arrangements, the Company allocates arrangement consideration among the elements based on the relative fair values of those elements as determined using vendor-specific objective evidence or third-party evidence. The Company uses its best estimate of selling price to allocate arrangement consideration between the deliverables in cases where neither vendor-specific objective evidence nor third-party evidence is available. A reserve for sales returns and allowances for customers is recorded based on historical experience or specific identification of an event necessitating a reserve. Revenue from contracts with the United States government, government prime contractors and some commercial customers is generally recorded on a percentage of completion basis using either units delivered or costs incurred as the measurement basis for progress towards completion. The output measure is used to measure results directly and is generally the best measure of progress toward completion in circumstances in which a reliable measure of output can be established. Estimated revenue in excess of amounts billed is reported as unbilled receivables. Contract accounting requires judgment in estimating costs and assumptions related to technical issues and delivery schedule. Contract costs include material, subcontractor costs, labor and an allocation of indirect costs. The estimation of costs at completion of a contract is subject to numerous variables involving contract costs and estimates as to the length of time to complete the contract. Changes in contract performance, estimated gross margin, including the impact of final contract settlements, and estimated losses are recognized in the period in which the changes or losses are determined. Product sales to certain international distributors are made under agreements that permit limited stock return privileges but not sales price rebates. Revenue on these sales is recognized upon shipment at which time title passes. The Company defers revenue and the related cost of sales on shipments to U.S. distributors and certain international distributors until the distributors resell the products to their customers. As a result, the Company’s revenue fully reflects end customer purchases and is not impacted by distributor inventory levels. Sales to certain of these distributors are made under agreements that allow such distributors to receive price-adjustment credits, as discussed below, and to return qualifying products for credit, as determined by the Company, in order to reduce the amounts of slow-moving, discontinued or obsolete product from their inventory. These agreements limit such returns to a certain percentage of the value of the Company’s shipments to that distributor during the prior quarter. In addition, such distributors are allowed to return unsold products if the Company terminates the relationship with the distributor. Certain distributors are granted price-adjustment credits for sales to their customers when the distributor’s standard cost (i.e., the Company’s sales price to the distributor) does not provide the distributor with an appropriate margin on its sales to its customers. As distributors negotiate selling prices with their customers, the final sales price agreed upon with the customer will be influenced by many factors, including the particular product being sold, the quantity ordered, the particular customer, the geographic location of the distributor and the competitive landscape. As a result, the distributor may request and receive a price-adjustment credit from the Company to allow the distributor to earn an appropriate margin on the transaction. Certain distributors are also granted price-adjustment credits in the event of a price decrease subsequent to the date the product was shipped and billed to the distributor. Generally, the Company will provide a credit equal to the difference between the price paid by the distributor (less any prior credits on such products) and the new price for the product multiplied by the quantity of the specific product in the distributor’s inventory at the time of the price decrease. Given the uncertainties associated with the levels of price-adjustment credits to be granted to certain distributors, the sales price to the distributor is not fixed or determinable until the distributor resells the products to their customers. Therefore, the Company defers revenue recognition from sales to certain distributors until the distributors have sold the products to their customers. Generally, title to the inventory transfers to the distributor at the time of shipment or delivery to the distributor, and payment from the distributor is due in accordance with the Company’s standard payment terms. These payment terms are not contingent upon the distributors’ sale of the products to their customers. Upon title transfer to distributors, inventory is reduced for the cost of goods shipped, the margin (sales less cost of sales) is recorded as “deferred income on shipments to distributors, net” and an account receivable is recorded. Shipping costs are charged to cost of sales as incurred. The deferred costs of sales to distributors have historically had very little risk of impairment due to the margins the Company earns on sales of its products and the relatively long life-cycle of the Company’s products. Product returns from distributors that are ultimately scrapped have historically been immaterial. In addition, price protection and price-adjustment credits granted to distributors historically have not exceeded the margins the Company earns on sales of its products. The Company continuously monitors the level and nature of product returns and is in frequent contact with the distributors to ensure reserves are established for all known material issues. As of August 4, 2018 and October 28, 2017, the Company had gross deferred revenue of $679.9 million and $589.5 million, respectively, and gross deferred cost of sales of $132.6 million and $115.5 million, respectively. The Company generally offers a twelve-month warranty for its products. The Company’s warranty policy provides for replacement of defective products. Specific accruals are recorded for known product warranty issues. Product warranty expenses during each of the three- and nine-month periods ended August 4, 2018 and July 29, 2017 were not material.

Revenue Recognition

Revenue from product sales to customers is generally recognized when title passes, which is upon shipment in the U.S. and in certain foreign countries. Revenue from product sales to customers in other foreign countries is recognized subsequent to product shipment. Title for shipments to these other foreign countries ordinarily passes within a week of shipment. Accordingly, the Company defers the revenue recognized relating to these other foreign countries until title has passed. For multiple element arrangements, the Company allocates arrangement consideration among the elements based on the relative fair values of those elements as determined using vendor-specific objective evidence or third-party evidence. The Company uses its best estimate of selling price to allocate arrangement consideration between the deliverables in cases where neither vendor-specific objective evidence nor third-party evidence is available. A reserve for sales returns and allowances for customers is recorded based on historical experience or specific identification of an event necessitating a reserve.

Revenue from contracts with the United States government, government prime contractors and some commercial customers is generally recorded on a percentage of completion basis using either units delivered or costs incurred as the measurement basis for progress towards completion. The output measure is used to measure results directly and is generally the best measure of progress toward completion in circumstances in which a reliable measure of output can be established. Estimated revenue in excess of amounts billed is reported as unbilled receivables. Contract accounting requires judgment in estimating costs and assumptions related to technical issues and delivery schedule. Contract costs include material, subcontractor costs, labor and an allocation of indirect costs. The estimation of costs at completion of a contract is subject to numerous variables involving contract costs and estimates as to the length of time to complete the contract. Changes in contract performance, estimated gross margin, including the impact of final contract settlements, and estimated losses are recognized in the period in which the changes or losses are determined.

Product sales to certain international distributors are made under agreements that permit limited stock return privileges but not sales price rebates. Revenue on these sales is recognized upon shipment at which time title passes.

The Company defers revenue and the related cost of sales on shipments to U.S. distributors and certain international distributors until the distributors resell the products to their customers. As a result, the Company’s revenue fully reflects end customer purchases and is not impacted by distributor inventory levels. Sales to certain of these distributors are made under agreements that allow such distributors to receive price-adjustment credits, as discussed below, and to return qualifying products for credit, as determined by the Company, in order to reduce the amounts of slow-moving, discontinued or obsolete product from their inventory. These agreements limit such returns to a certain percentage of the value of the Company’s shipments to that distributor during the prior quarter. In addition, such distributors are allowed to return unsold products if the Company terminates the relationship with the distributor.

Certain distributors are granted price-adjustment credits for sales to their customers when the distributor’s standard cost (i.e., the Company’s sales price to the distributor) does not provide the distributor with an appropriate margin on its sales to its customers. As distributors negotiate selling prices with their customers, the final sales price agreed upon with the customer will be influenced by many factors, including the particular product being sold, the quantity ordered, the particular customer, the geographic location of the distributor and the competitive landscape. As a result, the distributor may request and receive a price-adjustment credit from the Company to allow the distributor to earn an appropriate margin on the transaction.

Certain distributors are also granted price-adjustment credits in the event of a price decrease subsequent to the date the product was shipped and billed to the distributor. Generally, the Company will provide a credit equal to the difference between the price paid by the distributor (less any prior credits on such products) and the new price for the product multiplied by the quantity of the specific product in the distributor’s inventory at the time of the price decrease.

Given the uncertainties associated with the levels of price-adjustment credits to be granted to certain distributors, the sales price to the distributor is not fixed or determinable until the distributor resells the products to their customers. Therefore, the Company defers revenue recognition from sales to certain distributors until the distributors have sold the products to their customers.

Generally, title to the inventory transfers to the distributor at the time of shipment or delivery to the distributor, and payment from the distributor is due in accordance with the Company’s standard payment terms. These payment terms are not contingent upon the distributors’ sale of the products to their customers. Upon title transfer to distributors, inventory is reduced for the cost of goods shipped, the margin (sales less cost of sales) is recorded as “deferred income on shipments to distributors, net” and an account receivable is recorded. Shipping costs are charged to cost of sales as incurred.

The deferred costs of sales to distributors have historically had very little risk of impairment due to the margins the Company earns on sales of its products and the relatively long life-cycle of the Company’s products. Product returns from distributors that are ultimately scrapped have historically been immaterial. In addition, price protection and price-adjustment credits granted to distributors historically have not exceeded the margins the Company earns on sales of its products. The Company continuously monitors the level and nature of product returns and is in frequent contact with the distributors to ensure reserves are established for all known material issues.

As of August 4, 2018 and October 28, 2017, the Company had gross deferred revenue of $679.9 million and $589.5 million, respectively, and gross deferred cost of sales of $132.6 million and $115.5 million, respectively.

The Company generally offers a twelve-month warranty for its products. The Company’s warranty policy provides for replacement of defective products. Specific accruals are recorded for known product warranty issues. Product warranty expenses during each of the three- and nine-month periods ended August 4, 2018 and July 29, 2017 were not material.