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

3 Months Ended

6 Months Ended

Mar. 29, 2020

Mar. 31, 2019

Mar. 29, 2020

Mar. 31, 2019

Sep. 29, 2019

Cash Flow Hedging [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Gains/(Losses) Recognized in OCI Before Reclassifications

$ (127.9)

$ (12.4)

$ (95.5)

$ (21.5)

Net Investment Hedging [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Gains/(Losses) Recognized in OCI Before Reclassifications

57.6

2.9

81.3

(19.0)

Net Investment Hedging [Member] | Cross-Currency Swap [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivatives used in Net Investment Hedge, Net of Tax

45.9

$ 0.0

Net Investment Hedging [Member] | Foreign Currency Contract - Other [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivatives used in Net Investment Hedge, Net of Tax

16.0

Net Investment Hedging [Member] | ForeignExchangeYenDebt [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivatives used in Net Investment Hedge, Net of Tax

(14.1)

$ (26.1)

Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Gains/(Losses) Recognized in OCI Before Reclassifications

(140.6)

(14.9)

(120.6)

(30.6)

Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Cross-Currency Swap [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Gains/(Losses) Recognized in OCI Before Reclassifications

2.9

5.4

9.1

(2.6)

Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Currency Contract - Other [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Gains/(Losses) Recognized in OCI Before Reclassifications

26.8

(2.9)

22.1

11.7

Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Coffee Contracts [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Gains/(Losses) Recognized in OCI Before Reclassifications

(12.1)

0.0

(1.1)

0.0

Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Dairy Contracts [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Gains/(Losses) Recognized in OCI Before Reclassifications

(4.9)

0.0

(5.0)

0.0

Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | Cross-Currency Swap [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Gains/(Losses) Recognized in OCI Before Reclassifications

58.0

0.0

68.7

0.0

Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | ForeignExchangeYenDebt [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Gains/(Losses) Recognized in OCI Before Reclassifications

(0.4)

2.9

12.6

(19.0)

Gains/(Losses) Reclassified from AOCI to Earnings

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

0.5

1.4

1.3

2.8

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

(0.4)

(0.1)

(0.6)

(0.5)

Interest Expense [Member] | Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | Cross-Currency Swap [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Gains/(Losses) Reclassified from AOCI to Earnings

3.9

0.0

7.2

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

0.2

1.4

5.8

(9.9)

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

2.0

0.0

2.0

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

(0.6)

0.0

(0.6)

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

0.9

1.3

2.6

2.7

Cost of Goods and Services Sold [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

(1.0)

1.7

(1.3)

2.2

Cost of Goods and Services Sold [Member] | 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

0.0

(0.1)

0.0

(0.3)

Cost of Goods and Services Sold [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

$ 0.7

$ 0.0

$ 0.7

$ 0.0