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Schedule II - Valuation and Qualifying Accounts (Tables)
12 Months Ended
Sep. 26, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Summary of Valuation Allowance The table below details the activity of the valuation allowance on deferred tax assets for fiscal 2021, 2020 and 2019 (in millions):
Balance at
Beginning of
Period
Charged to
Costs and
Expenses
OtherBalance at
End of
Period
Year ended September 26, 2021$1,728 $197 $$1,926 
Year ended September 27, 20201,672 60 (4)1,728 
Year ended September 29, 20191,529 143 — 1,672