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Derivative Instruments (Narrative) (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Derivative
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value, Net					$ 5,500,000
Loss on ineffective hedge	$ 0	$ (200,000)	$ (1,200,000)	$ (200,000)
Amount of derivaitve cash flow hedge to be repcognized in the next 12 months			$ 5,700,000	$ 9,600,000
Interest rate swap contract
Derivative
Derivative, notional amount					500,000,000
Interest rate swap contract 2
Derivative
Derivative, notional amount					500,000,000
Foreign currency derivatives
Derivative
Derivative, notional amount	51,300,000		51,300,000		78,800,000
Commodity derivative contracts
Derivative
Derivative, notional amount	76,000,000.0		76,000,000.0		99,500,000
Unrealized (loss) gain in other comprehensive income			$ 14,000,000.0		$ 3,700,000

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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Amount of gain (loss) from the ineffectiveness of the hedge.

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Net fair value of all derivatives designated as hedges of net investment in foreign operations.

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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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