Financing Arrangements (Components Of Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Dec. 31, 2011
Debt Instrument [Line Items]
Total long-term debt	$ 705.2	[1]	$ 707.0	[1]
Less current portion	3.0	[1]	3.0	[1]
Total long-term debt, net of current portion	702.2	[1]	704.0	[1]
7.500% Debentures Due 2015 [Member]
Debt Instrument [Line Items]
Total long-term debt	50.0	[1]	50.0	[1]
Interest rate of senior notes, debentures and medium-term notes	7.50%
Maturity date of debt instrument	2015
Senior Secured Term Loan Due 2017 [Member]
Debt Instrument [Line Items]
Total long-term debt	295.2	[1]	297.0	[1]
Maturity date of debt instrument	2017
7.375% Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 360.0	[1]	$ 360.0	[1]
Interest rate of senior notes, debentures and medium-term notes	7.375%
Maturity date of debt instrument	2020

[1] (1)Book values include unamortized discounts, as applicable.