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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
--- | ---
Sep. 27, 2020 | Sep. 29, 2019 | Sep. 30, 2018
Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(Loss) Recognized in OCI Before Reclassifications | $ (126.3) | $ (14.1) | $ 24.4
Net Investment Hedges [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(Loss) Recognized in OCI Before Reclassifications | 38.7 | (39.8) | 7.8
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 | (126.1) | (27.8) | 14.1
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 | 4.4 | (5.9) | (6.1)
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 | (6.4) | 20.8 | 16.7
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 | (1.2) | (1.2) | (0.3)
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 | 3.0 | 0.0 | 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 | 56.8 | 0.0 | 0.0
Designated as Hedging Instrument [Member] | Net Investment Hedges [Member] | Foreign Currency Contract - Other [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(Loss) Recognized in OCI Before Reclassifications | 0.0 | 0.0 | (0.1)
Gains/(Losses) Reclassified from AOCI to Earnings | 0.0 | 0.0 | 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 | (18.1) | (39.8) | 7.9
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] | Cross-Currency Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains/(Losses) Reclassified from AOCI to Earnings | (6.1) | (19.8) | 1.9
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 | 6.1 | 0.0 | 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 | (1.7) | 0.0 | 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 | 0.0 | 4.7 | 4.9
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 | 2.3 | 0.1 | 0.3
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 | 13.3 | 0.0 | 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 | 5.5 | 7.0 | (0.3)
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 | (8.7) | 4.4 | (3.3)
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 | 0.5 | (0.3) | (7.4)
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 | $ 4.0 | $ 0.0 | $ 0.0

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