Long-Term Debt And Short-Term Borrowings (Notes Payable and Long-term Debt) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total debt	$ 1,019.4	$ 939.5
Current portion	54.8	43.2
Debt issuance costs, unamortized	6.0	7.1
Long-term debt, net	958.6	889.2
Other borrowings
Debt Instrument [Line Items]
Total debt	0.4	0.6
Senior Secured Notes | Euro Senior Secured Term Loan A, due January 2022 (floating interest rate of 1.50% at September 30, 2018 and 1.50% at December 31, 2017)
Debt Instrument [Line Items]
Total debt	$ 318.6	$ 345.0
Line of Credit Facility, Interest Rate at Period End	1.50%	1.50%
Senior Secured Notes | Australian Dollar Senior Secured Term Loan A, due January 2022 (floating interest rate of 3.50% at September 30, 2018 and 3.29% at December 31, 2017)
Debt Instrument [Line Items]
Total debt	$ 52.6	$ 60.0
Line of Credit Facility, Interest Rate at Period End	3.50%	3.29%
Senior Secured Notes | U.S. Dollar Senior Secured Revolving Credit Facility, due January 2022 (floating interest rate of 3.87% at September 30, 2018 and 3.53% at December 31, 2017)
Debt Instrument [Line Items]
Total debt	$ 197.1	$ 48.9
Line of Credit Facility, Interest Rate at Period End	3.87%	3.53%
Senior Secured Notes | Australian Dollar Senior Secured Revolving Credit Facility, due January 2022 (floating interest rate of 3.50% at September 30, 2018 and 3.28% at December 31, 2017)
Debt Instrument [Line Items]
Total debt	$ 75.7	$ 85.0
Line of Credit Facility, Interest Rate at Period End	3.50%	3.28%
Senior Notes | Senior Unsecured Notes, due December 2024 (fixed interest rate of 5.25%)
Debt Instrument [Line Items]
Total debt	$ 375.0	$ 400.0
Stated Percentage	5.25%	5.25%
Senior Secured Credit Facility Due January 2022
Debt Instrument [Line Items]
Debt Instrument, Term	5 years
2017 Revolving Facility | Senior Secured Notes
Debt Instrument [Line Items]
Total debt	$ 272.8