Indebtedness (Components Of Indebtedness) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Credit facility	$ 600.0	$ 665.0
Other long-term debt	59.7	62.0
Total indebtedness	1,406.7	1,469.8
Less: Current portion of long-term debt	(52.8)	(60.1)
Total indebtedness, less current portion	1,353.9	1,409.7
1 1/4% Convertible Senior Subordinated Notes Due 2036 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	1.25%	1.25%
Long-term debt	189.9	183.4
4 1/2% Senior Unsecured Term Loan Due May 2, 2016 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	4.50%	4.50%
Long-term debt	257.1	259.4
5 7/8% Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	5.875%	5.875%
Long-term debt	$ 300.0	$ 300.0