Derivative Financial Instruments (Pretax Gains and Losses on Derivative Contracts Designated as Hedging Instruments Recognized in OCI and Reclassifications from AOCI to Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Sep. 29, 2019
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI Before Reclassifications	$ 283.8	$ (126.3)	$ (14.1)
Net Investment Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI Before Reclassifications	63.1	38.7	(39.8)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI Before Reclassifications	56.1	(126.1)	(27.8)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Cross-Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI Before Reclassifications	13.7	4.4	(5.9)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Currency Contract - Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI Before Reclassifications	(10.0)	(6.4)	20.8
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Coffee Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI Before Reclassifications	223.5	(1.2)	(1.2)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Dairy Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI Before Reclassifications	0.5	3.0	0.0
Designated as Hedging Instrument [Member] | Net Investment Hedges [Member] | Cross-Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI Before Reclassifications	20.5	56.8	0.0
Designated as Hedging Instrument [Member] | Net Investment Hedges [Member] | ForeignExchangeYenDebt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI Before Reclassifications	42.6	(18.1)	(39.8)
Gains/(Losses) Reclassified from AOCI to Earnings	0.0	0.0	0.0
Interest and Other Income [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	(3.6)	0.0	0.0
Interest and Other Income [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Cross-Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	12.7	(6.1)	(19.8)
Interest and Other Income [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Currency Contract - Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	0.0	6.1	0.0
Interest and Other Income [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Dairy Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	0.0	(1.7)	0.0
Interest Expense [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	(1.8)	0.0	4.7
Interest Expense [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Cross-Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	1.9	2.3	0.1
Interest Expense [Member] | Designated as Hedging Instrument [Member] | Net Investment Hedges [Member] | Cross-Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	13.4	13.3	0.0
Franchised Units Revenue [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Currency Contract - Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	1.8	5.5	7.0
Product and Distribution Costs | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Currency Contract - Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	(7.3)	(8.7)	4.4
Product and Distribution Costs | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Coffee Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	(3.5)	0.5	(0.3)
Product and Distribution Costs | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Dairy Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) Reclassified from AOCI to Earnings	$ 1.7	$ 4.0	$ 0.0