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Derivative Instruments - Additional Information (Detail)
$ in Millions, $ in Millions
12 Months Ended
Sep. 28, 2024
USD ($)
Sep. 28, 2024
CAD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2023
CAD ($)
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 $ 99      
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a net liability position by counterparty 1,100   $ 1,600  
Derivatives designated as hedges | Interest rate | Fair Value Hedging        
Derivative [Line Items]        
Derivative, Notional Amount 12,000   13,500  
Derivatives designated as hedges | Foreign exchange | Cash Flow Hedging        
Derivative [Line Items]        
Derivative, Notional Amount 9,900   8,300  
Derivatives designated as hedges | Currency Swap | Fair Value Hedging        
Derivative [Line Items]        
Derivative, Notional Amount 1,000 $ 1,300 1,000 $ 1,300
Derivatives not designated as hedges | Foreign exchange        
Derivative [Line Items]        
Derivative, Notional Amount 3,400   3,100  
Derivatives not designated as hedges | Currency Swap | Fair Value Hedging        
Derivative [Line Items]        
Derivative, Notional Amount 900 $ 1,300 900 $ 1,300
Derivatives not designated as hedges | Other        
Derivative [Line Items]        
Derivative, Notional Amount $ 500   $ 400