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Derivative Instruments - Additional Information (Detail)
$ in Millions, $ in Millions
12 Months Ended
Oct. 01, 2022
USD ($)
Oct. 01, 2022
CAD ($)
Oct. 02, 2021
USD ($)
Oct. 02, 2021
CAD ($)
Derivative [Line Items]        
Hedged Instruments Maturity Upper Limit 4 years      
Net deferred loss recorded in AOCI for contracts that will be reclassified to earnings in the next twelve months $ 704      
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a net liability position by counterparty 1,507   $ 244  
Derivatives designated as hedges | Interest rate | Fair Value Hedging        
Derivative [Line Items]        
Derivative, Notional Amount 14,500   15,100  
Derivatives designated as hedges | Foreign exchange | Cash Flow Hedging        
Derivative [Line Items]        
Derivative, Notional Amount 7,400   6,900  
Derivatives designated as hedges | Currency Swap | Fair Value Hedging        
Derivative [Line Items]        
Derivative, Notional Amount 900 $ 1,300 1,000 $ 1,300
Derivatives not designated as hedges | Foreign exchange        
Derivative [Line Items]        
Derivative, Notional Amount 3,800   3,500  
Derivatives not designated as hedges | Other        
Derivative [Line Items]        
Derivative, Notional Amount $ 400   $ 400