Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net income (loss)	$ 46.7	$ 36.8	$ 75.0	$ 47.7
Foreign currency translation adjustment	(3.3)	(1.6)	(5.7)	0.3
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3.3)	(1.6)	(5.7)	0.3
Comprehensive income (loss)	$ 43.4	$ 35.2	$ 69.3	$ 48.0