Indebtedness (Components Of Indebtedness) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Convertible debt	$ 0	$ 201,200,000
Credit facility	735,000,000	360,000,000
Other long-term debt	133,600,000	114,000,000
Total indebtedness	1,421,200,000	1,250,200,000
Less: Current portion of long-term debt	(88,400,000)	(110,500,000)
Convertible Notes Payable, Current	0	(201,200,000)
Total indebtedness, less current portion	1,332,800,000	938,500,000
1 1/4% Convertible Senior Subordinated Notes Due 2036 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, percent	1.25%	1.25%
Convertible Notes Payable, Current	0	(201,200,000)
4 1/2% Senior Unsecured Term Loan Due May 2, 2016 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, percent	4.50%	4.50%
Senior notes	252,600,000	275,000,000
5 7/8% Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, percent	5.875%	5.875%
Senior notes	$ 300,000,000	$ 300,000,000