Derivative and Financial Instruments (Notional Amounts of Outstanding Derivative Contracts) (Details) - USD ($) $ in Millions	Dec. 30, 2018	Sep. 30, 2018
Interest Rate Contract [Member]
Derivative [Line Items]
Notional amounts of outstanding derivative contracts	$ 1,250	$ 750
Cross-Currency Swap [Member]
Derivative [Line Items]
Notional amounts of outstanding derivative contracts	427	434
Foreign Currency Contract - Other [Member]
Derivative [Line Items]
Notional amounts of outstanding derivative contracts	1,067	914
Dairy Contracts [Member]
Derivative [Line Items]
Notional amounts of outstanding derivative contracts	11	16
Diesel and Other Contracts [Member]
Derivative [Line Items]
Notional amounts of outstanding derivative contracts	$ 45	$ 21