(Financial Instruments and Hedging Activities - Additional Information) (Details) $ in Millions	9 Months Ended
Sep. 30, 2019 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Cumulative deferred hedging gain (loss), after tax, included in accumulated other comprehensive income	$ 35.6
Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Notional Amount	972.6
Intercompany Debt [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Foreign currency denominated debt designated to hedge investments in certain foreign subsidiaries and affiliates	4,500.0
Debt [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Foreign currency denominated debt designated to hedge investments in certain foreign subsidiaries and affiliates	12,300.0
Interest Rate Risk [Member] \| Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative instruments, gain (loss) recognized in income, net	34.5
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	22.6
Royalty Arrangement [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Notional Amount	$ 712.2
Period covered by hedge	18 months

Derivative Instruments and Hedging Activities Disclosure [Line Items]

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Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Nominal or face amount used to calculate payment on derivative.

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Amount of unrealized gain (loss) related to the fair value of interest rate derivatives designated as fair value hedging instruments, as offset by the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective.

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Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Nominal or face amount used to calculate payments on a nonderivative instrument.

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