Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statement of Income and Comprehensive Income [Abstract]
Net income	$ 24.0	$ 21.6	$ 68.8	$ 160.3
Translation adjustment	4.2	(14.3)	(1.2)	(1.9)
Amortization of prior service credits, net of tax	(2.7)	(2.8)	(8.2)	(8.2)
Total comprehensive income	25.5	4.5	59.4	150.2
Less: Comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to PolyOne common shareholders	$ 25.5	$ 4.5	$ 59.4	$ 150.2