Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 78.4us-gaap_ProfitLoss	$ 242.7us-gaap_ProfitLoss	$ 71.8us-gaap_ProfitLoss
Other comprehensive loss:
Translation adjustments	(27.5)	(3.7)	1.1
Amortization of prior service credits, net of tax of $6.5 - 2012	0	0	(10.9)
Total other comprehensive loss	(27.5)	(3.7)	(9.8)
Total comprehensive income	50.9	239.0	62.0
Comprehensive loss attributable to noncontrolling interests	0.8	1.1	0.1
Comprehensive income attributable to PolyOne common shareholders	$ 51.7us-gaap_ComprehensiveIncomeNetOfTax	$ 240.1us-gaap_ComprehensiveIncomeNetOfTax	$ 62.1us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of (increase) decrease in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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