Debt (Schedule Of Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total long-term debt, less current portion	$ 950.9	$ 1,003.0
Long-Term Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 1,003.0	$ 1,042.6
Weighted average year- end interest rate	3.25%	3.20%
Current Portion And Short-Term Debt [Member]
Debt Instrument [Line Items]
Less current portion and short-term debt	$ 52.1	$ 39.6
Current portion and short-term debt, Weighted average year-end interest rate	3.26%	3.18%
Long-Term Debt, Less Current Portion [Member]
Debt Instrument [Line Items]
Total long-term debt, less current portion	$ 950.9	$ 1,003.0
Long-term debt, Weighted average year-end interest rate	3.25%	3.20%
Term Loan A Due 2018 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 496.0	$ 530.9
Weighted average year- end interest rate	3.24%	3.14%
Term Loan B Due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 461.9	$ 466.6
Weighted average year- end interest rate	3.50%	3.50%
Tax Exempt Bonds Due 2025 - 2041 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 45.1	$ 45.1
Weighted average year- end interest rate	0.87%	0.88%