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Revenue (Tables 2)
 12 Months Ended
Nov. 27, 2020
Allowance for Doubtful Accounts  
Movement in Valuation Allowances and Reserves  
Allowance for doubtful accounts rollforward
During fiscal 2020, 2019 and 2018, our allowance for doubtful accounts activities were as follows:
(in millions)202020192018
Beginning balance$10 $15 $9 
Increase due to acquisition— — 6 
Charged to operating expenses31 5 6 
Deductions(1)
(20)(10)(6)
Ending balance$21 $10 $15 
________________________________________
(1)     Deductions related to the allowance for doubtful accounts represent amounts written off against the allowance, less recoveries.
Revenue Reserve  
Movement in Valuation Allowances and Reserves  
Revenue reserve rollforward
During fiscal 2020, 2019 and 2018, our revenue reserve activities were as follows:
(in millions)202020192018
Beginning balance$7 $25 $22 
Impacts of adoption of the new revenue standard— (15)— 
Amount charged to revenue24 19 65 
Actual returns(21)(22)(62)
Ending balance$10 $7 $25