Derivative and Financial Instruments (Notional Amounts of Outstanding Derivative Contracts) (Details) - USD ($) $ in Millions	Dec. 27, 2020	Sep. 27, 2020
Coffee Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 109	$ 63
Cross-Currency Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	854	870
Dairy Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	44	61
Diesel and Other Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	11	5
Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount	1,750	1,750
Foreign Currency Contract - Other [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	$ 1,140