Financing Arrangements (Components Of Long-Term Debt) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total long-term debt	$ 1,099.8	$ 1,023.8
Other debt	13.5	13.5
Less current portion	61.8	61.8
Total long-term debt, net of current portion	1,038.0	962.0
7.500% Debentures Due 2015 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 48.7	$ 48.7
Interest rate of senior notes, debentures and medium-term notes.	7.50%	7.50%
Maturity date of debt instrument	Dec. 15, 2015	Dec. 15, 2015
Revolving Credit Facility Due 2018 [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 121.0	$ 45.0
7.375% Senior Notes Due 2020 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 316.6	$ 316.6
Interest rate of senior notes, debentures and medium-term notes.	7.375%	7.375%
Maturity date of debt instrument	Sep. 15, 2020	Sep. 15, 2020
5.250% Senior Notes Due 2023 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 600.0	$ 600.0
Interest rate of senior notes, debentures and medium-term notes.	5.25%	5.25%
Maturity date of debt instrument	Mar. 15, 2023	Mar. 15, 2023