Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 50.0	$ 67.0	$ 89.0	$ 97.2
Other comprehensive income
Translation adjustments	(4.1)	3.3	(4.3)	(14.6)
Unrealized gain on available-for-sale securities	0.0	0.4	0.0	0.4
Total comprehensive income	45.9	70.7	84.7	83.0
Comprehensive (income) loss attributable to noncontrolling interests	0.0	(0.2)	0.1	(0.2)
Comprehensive income attributable to PolyOne common shareholders	$ 45.9	$ 70.5	$ 84.8	$ 82.8