Condensed Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Sales	$ 958.4	$ 1,008.9	$ 2,966.2	$ 2,847.6
Cost of sales	775.8	827.6	2,410.9	2,300.3
Gross margin	182.6	181.3	555.3	547.3
Selling and administrative expense	119.0	119.7	385.9	364.6
Income related to previously owned equity affiliates	0	0	0	0.1
Operating income	63.6	61.6	169.4	182.8
Interest expense, net	(15.4)	(16.0)	(46.6)	(48.2)
Debt Extinguishment Costs	0	(5.2)	0	(15.8)
Other expense, net	(1.8)	(1.6)	(3.2)	(1.4)
Income from continuing operations before Income Taxes	46.4	38.8	119.6	117.4
Income tax expense	(14.1)	(15.8)	(27.4)	(45.1)
Net income from continuing operations	32.3	23.0	92.2	72.3
Income (loss) from discontinued operations, net of income taxes	0.4	(0.2)	1.2	146.2
Net Income	32.7	22.8	93.4	218.5
Net loss attributable to noncontrolling interests	0	0.2	0.4	0.7
Net income attributable to PolyOne common shareholders	$ 32.7	$ 23.0	$ 93.8	$ 219.2
Earnings per common share attributable to PolyOne common shareholders - Basic:
Continuing operations	$ 0.35	$ 0.24	$ 0.99	$ 0.77
Discontinued operations	$ 0.01	$ 0.00	$ 0.02	$ 1.53
Total	$ 0.36	$ 0.24	$ 1.01	$ 2.30
Earnings per common share attributable to PolyOne common shareholders - Diluted:
Continuing operations	$ 0.35	$ 0.24	$ 0.98	$ 0.76
Discontinued operations	$ 0.00	$ 0.00	$ 0.01	$ 1.51
Total	$ 0.35	$ 0.24	$ 0.99	$ 2.27
Weighted-average shares used to compute earnings per share:
Basic	91.8	96.7	93.1	95.4
Diluted	93.1	98.1	94.3	96.4
Cash dividends declared per common stock	$ 0.08	$ 0.06	$ 0.24	$ 0.18