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Equity (Schedule of Share Repurchases) (Details) - Class A [Member] - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Sep. 30, 2023
Oct. 01, 2022
Oct. 02, 2021
Class of Stock [Line Items]      
Treasury Stock, Shares, Acquired 5.6 8.2 0.9
Payments for Repurchase of Common Stock $ 354 $ 702 $ 67
Under share repurchase program      
Class of Stock [Line Items]      
Treasury Stock, Shares, Acquired 4.7 6.9 0.0
Payments for Repurchase of Common Stock $ 300 $ 587 $ 0
To fund certain obligations under equity compensation plans      
Class of Stock [Line Items]      
Treasury Stock, Shares, Acquired 0.9 1.3 0.9
Payments for Repurchase of Common Stock $ 54 $ 115 $ 67