Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 144.7	$ 78.4	$ 242.7
Other comprehensive loss:
Translation adjustments	(29.1)	(27.5)	(3.7)
Unrealized gain on available-for-sale securities	0.1	0.0	0.0
Total other comprehensive loss	(29.0)	(27.5)	(3.7)
Total comprehensive income	115.7	50.9	239.0
Comprehensive (income) loss attributable to noncontrolling interests	(0.1)	0.8	1.1
Comprehensive income attributable to PolyOne common shareholders	$ 115.6	$ 51.7	$ 240.1