Financial Instruments - Notional Amounts of Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 25, 2021	Sep. 25, 2021
Derivative instruments designated as accounting hedges | Foreign exchange contracts
Derivative [Line Items]
Derivatives, notional amount	$ 77,009	$ 76,475
Derivative instruments designated as accounting hedges | Interest rate contracts
Derivative [Line Items]
Derivatives, notional amount	16,875	16,875
Derivatives instruments not designated as accounting hedges | Foreign exchange contracts
Derivative [Line Items]
Derivatives, notional amount	$ 176,268	$ 126,918