Derivative Financial Instruments (Pretax Gains and Losses on Derivative Contracts Not Designated as Hedging Instruments Recognized in Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Sep. 29, 2019
Interest and Other Income [Member] | Foreign Currency Contract - Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 7.5	$ 0.3	$ (8.1)
Interest and Other Income [Member] | Dairy Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	0.0	0.0	(1.9)
Interest and Other Income [Member] | Diesel and Other Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	2.6	(8.8)	(5.9)
Interest Expense [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(0.5)	28.7	54.7
Interest Expense [Member] | Long-term Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 14.0	$ (23.8)	$ (50.7)