Derivative and Financial Instruments (Notional Amounts of Outstanding Derivative Contracts) (Details) - USD ($) $ in Millions	Jun. 27, 2021	Sep. 27, 2020
Coffee Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 463	$ 63
Cross-Currency Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	822	870
Dairy Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	39	61
Diesel and Other Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	13	5
Foreign Currency Contract - Other [Member]
Derivative [Line Items]
Derivative, Notional Amount	1,129	1,140
Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 1,750	$ 1,750