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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section S99
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 225
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-Section S99
-Paragraph 2
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Segment Information (Schedule of Segment Information) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) segment	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Segment Reporting [Abstract]
Number of reportable segments \| segment			5
Segment Reporting Information [Line Items]
Sales	$ 861.5	$ 887.1	$ 1,708.5	$ 1,760.2
Operating Income	81.5	80.3	152.8	150.4
Assets	2,619.8		2,619.8		$ 2,595.1
Color, Additives and Inks
Segment Reporting Information [Line Items]
Sales	206.0	213.8	407.2	419.8
Operating Income	38.2	39.6	73.1	73.4
Specialty Engineered Materials
Segment Reporting Information [Line Items]
Sales	131.6	128.0	260.0	258.6
Operating Income	21.4	20.1	44.8	43.2
Designed Structures and Solutions
Segment Reporting Information [Line Items]
Sales	103.3	111.4	211.4	230.1
Operating Income	1.0	4.5	1.4	7.7
Performance Products and Solutions
Segment Reporting Information [Line Items]
Sales	152.0	170.7	297.2	326.4
Operating Income	21.3	16.3	41.0	27.8
PolyOne Distribution
Segment Reporting Information [Line Items]
Sales	268.6	263.2	532.7	525.3
Operating Income	17.8	19.1	35.3	34.8
Operating Segments \| Color, Additives and Inks
Segment Reporting Information [Line Items]
Sales	212.2	217.4	417.1	425.9
Assets	961.7		961.7		939.5
Operating Segments \| Specialty Engineered Materials
Segment Reporting Information [Line Items]
Sales	143.3	139.7	284.3	281.6
Assets	434.9		434.9		353.4
Operating Segments \| Designed Structures and Solutions
Segment Reporting Information [Line Items]
Sales	103.3	111.6	211.8	230.7
Assets	456.1		456.1		449.5
Operating Segments \| Performance Products and Solutions
Segment Reporting Information [Line Items]
Sales	172.8	190.3	339.0	366.2
Assets	255.4		255.4		237.4
Operating Segments \| PolyOne Distribution
Segment Reporting Information [Line Items]
Sales	272.6	266.8	541.4	532.5
Assets	224.9		224.9		200.0
Corporate and eliminations
Segment Reporting Information [Line Items]
Sales	(42.7)	(38.7)	(85.1)	(76.7)
Operating Income	(18.2)	$ (19.3)	(42.8)	$ (36.5)
Assets	$ 286.8		$ 286.8		$ 415.3