Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 55.6	$ (2.2)	$ 193.1	$ 72.8
Foreign currency translation adjustment	(5.2)	2.0	(5.4)	(3.7)
Other comprehensive loss, net of tax	(5.2)	2.0	(5.4)	(3.7)
Comprehensive income (loss)	$ 50.4	$ (0.2)	$ 187.7	$ 69.1