Fair Value Measurements And Derivative Instruments (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019
Derivatives, Fair Value [Line Items]
Long-term Debt	$ 2,156,600,000	$ 1,812,823,000	$ 2,156,634,000
Effective interest rate				5.10%
Hedging Instruments, Non-derivative, Assets	$ 9,500,000		5,500,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax		0	2,200,000
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months		3,500,000	7,000,000.0
Foreign currency derivatives
Derivatives, Fair Value [Line Items]
Unrealized loss		200,000	100,000
Notional amount		78,800,000	19,600,000
Commodity derivative contracts
Derivatives, Fair Value [Line Items]
Unrealized gain		500,000	300,000
Unrealized loss		4,100,000	11,000,000.0
Notional amount		99,500,000	142,100,000
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		3,700,000	$ 10,700,000
Interest rate swap
Derivatives, Fair Value [Line Items]
Unrealized gain on derivatives		2,900,000
Unrealized loss on derivatives		100,000
Notional amount				$ 500,000,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent		$ 2,900,000
Interest rate swap 2
Derivatives, Fair Value [Line Items]
Notional amount				$ 500,000,000
Minimum [Member]
Derivatives, Fair Value [Line Items]
Derivative, Term of Contract	3 years
Maximum [Member]
Derivatives, Fair Value [Line Items]
Derivative, Term of Contract	5 years
Plan
Derivatives, Fair Value [Line Items]
Effective interest rate				4.85%