Avient (AVNT) 10-Q25 Oct 132013 Q3 Quarterly reportFinancial data

Company Profile

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
Document And Entity Information	Sep. 30, 2013	Oct. 10, 2013
Document And Entity Information [Abstract]
Entity Registrant Name	POLYONE CORP
Entity Central Index Key	1122976
Document Type	10-Q
Document Period End Date	30-Sep-13
Amendment Flag	FALSE
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		96,240,833

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Income (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Sales	$1,008.90	$707.70	$2,847.60	$2,209.80
Cost of sales	827.6	572.6	2,300.30	1,798.40
Gross margin	181.3	135.1	547.3	411.4
Selling and administrative expense	119.7	91.6	364.6	287.6
Income related to previously owned equity affiliates	0	0	0.1	0.4
Operating income	61.6	43.5	182.8	124.2
Interest expense, net	-16	-12.4	-48.2	-37.1
Debt Extinguishment Costs	-5.2	0	-15.8	0
Other (expense) income, net	-1.6	-0.5	-1.4	-2.7
Income from Continuing Operations before Income Taxes	38.8	30.6	117.4	84.4
Income tax expense	-15.8	-11.2	-45.1	-31.3
Net income from continuing operations	23	19.4	72.3	53.1
Income from discontinued operations, net of income taxes	-0.2	4.6	146.2	15.7
Net Income	22.8	24	218.5	68.8
Net loss attributable to noncontrolling interests	0.2	0	0.7	0
Net income attributable to PolyOne common shareholders	$23	$24	$219.20	$68.80
Earnings per common share attributable to PolyOne common shareholders - Basic:
Continuing operations, basic (in dollars per share)	$0.24	$0.22	$0.77	$0.60
Discontinued operations, basic (in dollars per share)	$0	$0.05	$1.53	$0.17
Total, basic (in dollars per share)	$0.24	$0.27	$2.30	$0.77
Earnings per common share attributable to PolyOne common shareholders - Diluted:
Continuing operations, diluted (in dollars per share)	$0.24	$0.22	$0.76	$0.59
Discontinued operations, diluted (in dollars per share)	$0	$0.05	$1.51	$0.17
Total, diluted (in dollars per share)	$0.24	$0.27	$2.27	$0.76
Weighted-average shares used to compute earnings per share:
Basic (in shares)	96.7	88.8	95.4	89
Diluted (in shares)	98.1	90.2	96.4	90.1
Cash dividends declared per common share (in dollars per share)	$0.06	$0.05	$0.18	$0.15

Consolidated_Statements_Of_Com

Consolidated Statements Of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net Income	$22.80	$24	$218.50	$68.80
Other comprehensive income
Translation adjustment	7.7	4.2	-3	-1.2
Amortization of prior service credits, net of tax	0	-2.7	0	-8.2
Total comprehensive income	30.5	25.5	215.5	59.4
Comprehensive loss attributable to noncontrolling interests	0.2	0	0.7	0
Comprehensive income attributable to PolyOne common shareholders	$30.70	$25.50	$216.20	$59.40

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$322.80	$210
Accounts receivable, net	505	313.9
Inventories, net	341.5	244.4
Assets held-for-sale	0	39.3
Other current assets	63.4	81.1
Total current assets	1,232.70	888.7
Property, net	644.4	385.8
Goodwill	555.6	405.5
Other intangible assets, net	370.8	340
Other non-current assets	139.6	108
Total assets	2,943.10	2,128
Current liabilities:
Short-term and current portion of long-term debt	9.9	3.8	[1]
Accounts payable	399.9	296.1
Liabilities held-for-sale	0	18
Accrued expenses	185.4	141.9
Total current liabilities	595.2	459.8
Non-current liabilities:
Long-term debt	977.8	703.1	[1]
Post-retirement benefits other than pensions	15.9	17
Pension benefits	107.6	182.8
Deferred Income Taxes and Other Liabilities, Noncurrent	140.7	31.8
Other non-current liabilities	109.3	102.1
Total non-current liabilities	1,351.30	1,036.80
Commitments and contingencies (Note 13)
Shareholders' equity
PolyOne shareholders' equity	994.6	629.1
Noncontrolling interests	2	2.3
Total equity	996.6	631.4
Total liabilities and shareholders' equity	$2,943.10	$2,128

[1]	Book values include unamortized discounts, as applicable.

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating Activities
Net Income	$218.50	$68.80
Adjustments to reconcile net income to net cash used by operating activities:
Depreciation and amortization	71.3	52.8
Restructuring - asset related charges	4.8	0
Debt Extinguishment Costs	15.8	0
Provision for doubtful accounts	0.5	0.7
Stock based compensation expense	13.2	7.8
Gain on Sale of Business	-223.7	0
Change in assets and liabilities, net of effect of acquisitions:
Increase in accounts receivable	-50.8	-54.2
Decrease (increase) in inventories	21.5	-14.3
(Decrease) Increase in accounts payable	-2.8	30.3
Decrease in pension and other post-retirement benefits	-76.9	-30.6
Increase in accrued expenses and other	3.8	25.6
Net cash (used) by operating activities	-4.8	86.9
Investing Activities
Capital expenditures	-41.8	-33
Business acquisitions, net of cash acquired	-259.4	0
Proceeds from sale of equity affiliate and other assets	274.7	18.9
Net cash used by investing activities	-26.5	-14.1
Financing Activities
Repayment of long-term debt	-341.7	-2.3
Premium on early extinguishment of long-term debt	-4.6	0
Proceeds from long-term debt	600	0
Debt financing costs	-13	0
Borrowings under credit facilities	126.2	0
Repayments under credit facilities	-117.5	0
Purchase of common shares for treasury	-95.7	-15.9
Exercise of stock awards	5.2	11.7
Cash dividends paid	-15.7	-12.5
Proceeds from noncontrolling interests	0	2.4
Net cash provided (used) by financing activities	143.2	-16.6
Effect of exchange rate changes on cash	0.9	0.6
Increase in cash and cash equivalents	112.8	56.8
Cash and cash equivalents at beginning of period	210	191.9
Cash and cash equivalents at end of period	$322.80	$248.70

Basis_Of_Presentation

Basis Of Presentation	9 Months Ended
Basis Of Presentation	Sep. 30, 2013
Accounting Policies [Abstract]
Basis Of Presentation	Note 1 — BASIS OF PRESENTATION
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with Form 10-Q instructions and in the opinion of management contain all adjustments, consisting of normal recurring accruals, necessary to present fairly the financial position, results of operations and cash flows for the periods presented. The preparation of financial statements in conformity with generally accepted accounting principles, requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from these estimates. These interim financial statements should be read in conjunction with the financial statements and accompanying notes included in the annual report on Form 10-K for the year ended December 31, 2012 of PolyOne Corporation, as updated by PolyOne's current report on Form 8-K filed August 23, 2013. Throughout this document prior period amounts have been referred to as "adjusted", which accounts for the Resin Business being classified as a discontinued operation as well as the re-organization of segment information, as discussed below.
	Operating results for the three and nine months ended September 30, 2013 are not necessarily indicative of the results that may be attained in subsequent periods, or for the year ending December 31, 2013.
	On March 13, 2013, pursuant to the terms and conditions of the Agreement and Plan of Merger dated October 23, 2012 (Spartech Merger Agreement), PolyOne acquired Spartech Corporation (Spartech), a supplier of sustainable plastic sheet, color and engineered materials, and packaging solutions, based in Clayton, Missouri. Spartech expands PolyOne's specialty portfolio with adjacent technologies in attractive end markets where we already participate, as well as new end markets such as aerospace and security. By combining Spartech's leading market positions in sheet, rigid barrier packaging and specialty cast acrylics with PolyOne's capabilities, we believe we can better serve our customers and accelerate growth.
	On May 30, 2013, PolyOne sold its vinyl dispersion, blending and suspension resin assets (Resin Business) to Mexichem Specialty Resins Inc. (Mexichem), a wholly-owned subsidiary of Mexichem, S.A.B. de C.V., for $250.0 million cash consideration, subject to a working capital adjustment that is expected to be finalized in the fourth quarter of 2013. This sale resulted in the recognition of a pre-tax gain of $223.7 million ($138.0 million net of tax), which is reflected within the Income from discontinued operations, net of income taxes line of the Condensed Consolidated Statements of Income.
	Reorganization of Segment Information
	As a result of the acquisition of Spartech, we created a new segment. Spartech's former Custom Sheet and Rollstock and Packaging Technology businesses are reported within this new segment referred to as "Designed Structures and Solutions", and the remaining Spartech businesses are being split among PolyOne's existing Global Specialty Engineered Materials, Global Color, Additives and Inks and Performance Products and Solutions segments.
	As a result of the sale of our Resin Business, this business has been removed from the Performance Products and Solutions segment and presented as a discontinued operation. Additionally, our Specialty Coatings business, which was previously included in the Performance Products and Solutions segment, is now included within the Global Color, Additives and Inks segment. Historical segment information has been retrospectively adjusted to reflect these changes. See Note 12, Segment Information for further information.

Business_Combinations

Business Combinations	9 Months Ended
Business Combinations	Sep. 30, 2013
Business Combinations [Abstract]
Business Combinations	Note 2 — BUSINESS COMBINATIONS
	Spartech Corporation
	On March 13, 2013, pursuant to the terms and conditions of the Spartech Merger Agreement, PolyOne acquired Spartech, a supplier of sustainable plastic sheet, color and engineered materials, and packaging solutions, based in Clayton, Missouri, with 2012 sales of $1,149.4 million and net income from continuing operations of $2.7 million.
	At the effective time of the merger, each issued and outstanding share of Spartech common stock was canceled and converted into the right to receive consideration equal to $2.67 in cash and 0.3167 shares of PolyOne common stock. PolyOne paid $83.4 million in cash and issued approximately 10.0 million shares of its common stock to Spartech's stockholders. PolyOne funded the cash portion of the consideration, and the repayment of certain portions of Spartech's debt, with a portion of the net proceeds of its issuance of 5.25% senior notes due 2023, discussed in Note 11, Financing Arrangements.
	PolyOne's management believes that the acquisition of Spartech will provide substantial synergies through enhanced operational cost efficiencies and will expand PolyOne's specialty portfolio. By combining Spartech's leading market positions in sheet, rigid barrier packaging and specialty cast acrylics with PolyOne's capabilities, we believe that we can better serve our customers and accelerate growth.
	Spartech's results have been reflected within our Condensed Consolidated Statements of Income and within our newly created segment Designed Structures and Solutions, as well as our existing Global Specialty Engineered Materials, Global Color, Additives and Inks and Performance Products and Solutions segments since the date of acquisition. Sales of former Spartech businesses included in our three and nine months ended September 30, 2013 results were $260.8 million and $593.0 million, respectively.
	Based on the closing price of PolyOne's common stock on March 13, 2013, the purchase price was comprised of the following:


	(In millions, except stock price and share data)
	Spartech shares outstanding	31.2
	Spartech shares outstanding	31.2
	Spartech restricted stock units	0.2
	Spartech restricted stock units	0.2
	Spartech shares converted	31.4
	Spartech shares converted	31.4
	Exchange ratio	0.3167
	Exchange ratio	0.3167
	PolyOne shares issued	10
	PolyOne shares issued	10
	PolyOne closing stock price on March 13, 2013	$	25.05
	PolyOne closing stock price on March 13, 2013	$	25.05
	Total value of PolyOne shares issued	$	249.9
	Total value of PolyOne shares issued	$	249.9
	Cash consideration transferred to Spartech shareholders	83.4
	Cash consideration transferred to Spartech shareholders	83.4
	Fair value of Spartech equity awards, net of deferred tax benefits (1)	2.4
		2.4
	Total consideration transferred to Spartech equity holders	335.7
	Total consideration transferred to Spartech equity holders	335.7
	Spartech revolving credit facilities repaid at close (2)	77.2
	Spartech revolving credit facilities repaid at close (2)	77.2
	Spartech senior notes repaid at close (2)	102.3
	Spartech senior notes repaid at close (2)	102.3
	Total consideration transferred to debt and equity holders	515.2
	Total consideration transferred to debt and equity holders	515.2
	Cash acquired	(4.1		)
	Total consideration transferred to debt and equity holders, net of cash acquired	$	511.1
		$	511.1
	(1) In accordance with ASC 718, Compensation — Stock Compensation, the fair value of replacement awards attributable to pre-combination service is recognized as part of purchase consideration. The $2.4 million represents the fair value of Spartech replacement equity awards of $3.9 million net of deferred tax benefits of $1.5 million. The fair value of awards attributable to post-combination service amounted to $2.7 million and are being recognized as stock compensation over their requisite service periods within PolyOne's Condensed Consolidated Statements of Income.
	(2) In accordance with the provisions of Spartech's 7.08% senior notes due 2016 and revolving credit facilities, at the time of closing, PolyOne repaid all borrowings under Spartech's revolving credit facilities, which amounted to $77.2 million. Additionally, PolyOne repaid $102.3 million related to Spartech's 7.08% senior notes due 2016, including $88.9 million of aggregated principal, $10.3 million make-whole provisions, and $3.1 million of interest payable.

	The acquisition of Spartech has been accounted for using the acquisition method of accounting, which requires, among other things, the assets acquired and liabilities assumed be recognized at their respective fair values as of the acquisition date. During the third quarter of 2013, we continued to refine our preliminary purchase price allocation, which resulted in a net increase to goodwill of $5.5 million. As of September 30, 2013, the purchase price allocation remains preliminary as we complete our assessment of certain reserves including environmental, legal and tax matters, as well as an assessment of deferred income taxes.
	The following table summarizes PolyOne's preliminary fair value estimates as of September 30, 2013:


	(In millions)	Preliminary Allocation
	Accounts receivable, net	$	139.5
	Accounts receivable, net	$	139.5
	Inventories, net	118.3
	Inventories, net	118.3
	Other current assets	17.4
	Other current assets	17.4
	Property, net	280.5
	Property, net	280.5
	Other non-current assets	20.2
	Other non-current assets	20.2
	Intangible assets, net	44.6
	Intangible assets, net	44.6
	Goodwill	148.2
	Goodwill	148.2
	Total assets acquired	768.7
	Total assets acquired	768.7
	Short-term and current portion of long-term debt	0.5
	Short-term and current portion of long-term debt	0.5
Accounts payable	105.2
Accounts payable	105.2
Accrued expenses	42.9
Accrued expenses	42.9
Long-term debt	11
Long-term debt	11
Other non-current liabilities	98
Other non-current liabilities	98
Total liabilities assumed	257.6
Total liabilities assumed	257.6
Net assets acquired	$	511.1
Net assets acquired	$	511.1
Goodwill is calculated as the excess of the consideration transferred over the assets acquired, and represents the estimated future economic benefits arising from other assets acquired that could not be individually identified and separately recognized. Goodwill has been allocated, on a preliminary basis, to the Designed Structures and Solutions, Global Color, Additives and Inks, Global Specialty Engineered Materials and Performance Products and Solutions segments. Goodwill recognized as a result of this acquisition is not deductible for tax purposes. See Note 4, Goodwill and Intangible Assets for information about goodwill and intangible assets.
The following unaudited pro forma information presents a summary of PolyOne's Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2013 and 2012, which includes Spartech's Statement of Operations for the respective periods, as if the acquisition and related financing occurred on January 1, 2012. Spartech's fiscal year ends on the Saturday closest to October 31, and as a result, the nine months ended September 30, 2012 includes an additional week in comparison to the nine months ended September 30, 2013. The following pro forma financial information is not necessarily indicative of the results of operations as they would have been had the transaction occurred on the assumed date, nor is it necessarily an indication of trends in future results for a number of reasons, including, but not limited to, differences between the assumptions used to prepare the pro forma information, cost savings from operating efficiencies, potential synergies, and the impact of incremental costs incurred in integrating the businesses.


	Three Months Ended September 30,						Nine Months Ended September 30,
(In millions)	Actual 2013				Pro Forma 2012		Pro Forma 2013		Pro Forma 2012
Sales	$	1,008.90			$	989.5	$	3,065.60	$	3,069.70
Sales	$	1,008.90			$	989.5	$	3,065.60	$	3,069.70
Net income from continuing operations	$	23			$	21.4	$	73.8	$	57.9
Net income from continuing operations	$	23			$	21.4	$	73.8	$	57.9
The unaudited pro forma financial information presented in the table above has been adjusted to give effect to adjustments that are: (1) directly related to the business combination; (2) factually supportable; and (3) expected to have a continuing impact. These adjustments include, but are not limited to, depreciation and amortization related to fair value adjustments to property, plant and equipment and intangible assets, and interest expense on acquisition-related debt.
Other Acquisitions
On December 19, 2012, PolyOne acquired all of the outstanding equity of Glasforms Inc. (Glasforms), a leading manufacturer of glass and carbon fiber reinforced polymers and advanced composite products, with 2012 annual sales of $51.1 million. The purchase marks PolyOne's entry into advanced composites, an adjacent technology consistent with the Company's strategy of providing specialty solutions that deliver high value to customers. Consideration transferred was $34.3 million, net of cash acquired of $1.2 million. Glasforms results are reflected within our Global Specialty Engineered Materials segment. On a preliminary basis, the acquisition resulted in goodwill of $12.8 million and $10.7 million of identifiable intangible assets. The purchase price allocation will be finalized during 2013 as we complete our assessment of certain reserves and deferred income taxes.
During the nine months ended September 30, 2013, we incurred $7.2 million of acquisition-related costs primarily associated with the Spartech acquisition, which are included within the Selling and administrative expense line in our Condensed Consolidated Statements of Income.

Discontinued_Operations

Discontinued Operations	9 Months Ended
Discontinued Operations	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Note 3 — DISCONTINUED OPERATIONS
	On May 30, 2013, PolyOne sold its Resin Business to Mexichem for $250.0 million cash consideration, subject to a working capital adjustment that is expected to be finalized in the fourth quarter of 2013. We do not expect the working capital adjustment to have a material impact on our financial statements. This sale resulted in the recognition of a pre-tax gain of $223.7 million ($138.0 million net of tax), which is reflected within the Income from discontinued operations, net of income taxes line of the Condensed Consolidated Statements of Income.

	PolyOne has classified the Resin Business assets and liabilities as held-for-sale for periods prior to disposition in the accompanying Condensed Consolidated Balance Sheets and has classified the Resin Business operating results and the gain on sale, net of tax, as discontinued operations in the accompanying Condensed Consolidated Statements of Income for all periods presented. Previously, the Resin Business was included in the Performance Products and Solutions segment. The Resin Business' sales, income before income taxes and income from discontinued operations, net of income taxes were as follows:


		Three Months Ended September 30,						Nine Months Ended September 30,
	(In millions)	2013			2012			2013*			2012
	Sales	$	—		$	32.5		$	55.3		$	103.5
	Sales	$	—		$	32.5		$	55.3		$	103.5

	Gain on sale	$	0.1		$	—		$	223.7		$	—
	Gain on sale	$	0.1		$	—		$	223.7		$	—
	Income from operations	—			7			12.2			24.2
	Income from operations	—			7			12.2			24.2
	Income before taxes	0.1			7			235.9			24.2
	Income before taxes	0.1			7			235.9			24.2
	Income tax expense	(0.3		)	(2.4		)	(89.7		)	(8.5		)
	Income from discontinued operations, net of income taxes	$	(0.2	)	$	4.6		$	146.2		$	15.7
	Income from discontinued operations, net of income taxes	$	(0.2	)	$	4.6		$	146.2		$	15.7
	* Includes the Resin Business' operating results through May 29, 2013.

	The following table summarizes the assets and liabilities of the Resin Business as of December 31, 2012:


	(In millions)	December 31, 2012
	Assets:
	Accounts receivable, net	$	8.8
	Accounts receivable, net	$	8.8
	Inventories, net	8.2
	Inventories, net	8.2
	Property, net	21.7
	Property, net	21.7
	Other assets	0.6
	Other assets	0.6
	Assets held-for-sale	$	39.3
	Assets held-for-sale	$	39.3

	Liabilities:
	Accounts payable	$	15.8
	Accounts payable	$	15.8
	Accrued expenses	2.2
	Accrued expenses	2.2
	Liabilities held-for-sale	$	18
	Liabilities held-for-sale	$	18

Goodwill_And_Intangible_Assets

Goodwill And Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill And Intangible Assets	Note 4 — GOODWILL AND INTANGIBLE ASSETS
	Goodwill as of and for the periods ended September 30, 2013 and December 31, 2012, and changes in the carrying amount of goodwill by operating segments were as follows:


	(In millions)	Global Specialty				Global Color,			Designed Structures and Solutions		Performance		PolyOne		Total
		Engineered				Additives and					Products and		Distribution
		Materials				Inks					Solutions
	Balance December 31, 2011	$	89.2			$	297.3		$	—	$	7.4	$	1.6	$	395.5

	Acquisitions of businesses	10				0.6			—		—		—		10.6

	Currency translation	(0.6		)		—			—		—		—		(0.6		)

	Balance December 31, 2012	98.6				297.9			—		7.4		1.6		405.5

	Acquisitions of businesses	4.3				12.8			131.8		1.5		—		150.4

	Currency translation	(0.3		)		—			—		—		—		(0.3		)

	Balance September 30, 2013	$	102.6			$	310.7		$	131.8	$	8.9	$	1.6	$	555.6

	Indefinite and finite-lived intangible assets consisted of the following:


		As of September 30, 2013
	(In millions)	Acquisition				Accumulated			Currency		Net
		Cost				Amortization			Translation
	Customer relationships	$	190.4			$	(32.0	)	$	0.3	$	158.7

	Sales contracts	11.4				(10.8		)	—		0.6

	Patents, technology and other	128.5				(16.8		)	0.1		111.8

	Indefinite-lived trade names	96.3				—			—		96.3

	In-process research and development	3.4				—			—		3.4

	Total	$	430			$	(59.6	)	$	0.4	$	370.8




		As of December 31, 2012
	(In millions)	Acquisition				Accumulated			Currency		Net
		Cost				Amortization			Translation
	Customer relationships	$	173.1			$	(25.7	)	$	0.5	$	147.9

	Sales contracts	11.4				(10.8		)	—		0.6

	Patents, technology and other	89.3				(10.1		)	0.1		79.3

	Indefinite-lived trade names	96.3				—			—		96.3

	In-process research and development	15.9				—			—		15.9

	Total	$	386			$	(46.6	)	$	0.6	$	340

	The fair values of intangible assets acquired in the Spartech acquisition included in the table below were determined using an income valuation approach. The fair value of these identifiable intangible assets, useful lives and valuation methodology are as follows:


	(In millions)	Fair Value			Useful Life	Valuation Method
	Technology	$	27.3		7 years	Relief-from royalty

	Customer Relationships	17.3			20 years	Multi-period excess earnings

	$	44.6

Employee_Separation_and_Plant_

Employee Separation and Plant Phase-out Costs	9 Months Ended
	Sep. 30, 2013
Restructuring and Related Activities [Abstract]
Employee Separation and Plant Phase-out Costs	Note 5 — EMPLOYEE SEPARATION AND PLANT PHASE-OUT COSTS

	On July 10, 2013, PolyOne determined it would close six former Spartech North American manufacturing facilities acquired in the March 2013 acquisition, and relocate production to other PolyOne facilities over the next 12 to 18 months. These actions are expected to be completed by the end of 2014. The manufacturing facilities’ closings are part of the Company’s ongoing integration of Spartech. This North American realignment is designed to enable the Company to better serve customers, improve efficiency and deliver a portion of the anticipated synergy-related cost savings in connection with the Spartech acquisition.
	The Company anticipates that it will incur approximately $35.0 million of charges in connection with this realignment, which are comprised of approximately $20.0 million of cash charges, primarily related to employee severance and plant exit costs, and approximately $15.0 million of non-cash charges, primarily related to accelerated depreciation. In the third quarter of 2013, we have incurred $1.8 million of cash related charges and $1.8 million of non-cash related charges under the North American realignment plan.
	Since the date of the acquisition through September 30, 2013, PolyOne has incurred severance charges totaling $11.6 million, including $1.8 million from the North American realignment, and $9.8 million primarily related to former Spartech executives and other former Corporate employees. Asset-related charges and other ongoing costs totaling $6.9 million were recognized since the date of acquisition through September 30, 2013, including $1.8 million related to the North American realignment, and $5.1 million primarily related to asset rationalization at other former Spartech locations, in addition to costs incurred under previously announced Spartech restructuring plans that were underway prior to PolyOne's acquisition of Spartech.
	The table below summarizes restructuring activity related to Spartech since the date of acquisition.


	(In millions)	Long-Lived Asset Charges			Employee Separation			Other Costs			Total
	Accrual balance at December 31, 2012	$	—		$	—		$	—		$	—

	Charge to expense	4.8			11.6			2.1			18.5

	Cash payments	—			(3.1		)	(2.1		)	(5.2		)

	Non-cash utilization	(4.8		)	—			—			(4.8		)

	Accrual balance at September 30, 2013	$	—		$	8.5		$	—		$	8.5

	In addition to the $18.5 million of Spartech related charges incurred since the date of acquisition, in the nine months ended September 30, 2013, we incurred $5.2 million of restructuring charges related to other actions to realign production capacities and improve return on invested capital. Total restructuring charges of $23.7 million included $4.8 million that were recognized within Cost of goods sold and $18.9 million that were recognized in Selling and administrative expenses within the Condensed Consolidated Statements of Income and Corporate and eliminations within segment disclosures for the nine months ended September 30, 2013.
	During the second quarter of 2012, the Company undertook actions to realign production capacities and improve return on invested capital. These actions were primarily in response to weak demand in Europe. These actions resulted in charges of $1.3 million and $10.5 million related to plant closure costs and reductions in force for the three and nine months ended September 30, 2012. These costs were primarily recognized within Selling and administrative expense in our Condensed Consolidated Statements of Income and within Corporate and eliminations in segment disclosures.

Inventories_Net

Inventories, Net	9 Months Ended
	Sep. 30, 2013
Inventory, Net [Abstract]
Inventories, Net	Note 6 — INVENTORIES, NET
	Components of Inventories, net are as follows:


	(In millions)	September 30, 2013		December 31, 2012
	At FIFO cost:

	Finished products	$	198	$	165

	Work in process	4.1		2.4

	Raw materials and supplies	139.4		77

	Inventories, net	$	341.5	$	244.4

Property_Net

Property, Net	9 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment [Abstract]
Property, Net	Note 7 — PROPERTY, NET
	Components of Property, net are as follows:


	(In millions)	September 30, 2013			December 31, 2012
	Land and land improvements	$	52.7		$	34.7

	Buildings	315			241.4

	Machinery and equipment	1,066.60			844.5

	Property, gross	1,434.30			1,120.60

	Less accumulated depreciation and amortization	(789.9		)	(734.8		)
	Property, net	$	644.4		$	385.8

Income_Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Note 8 — INCOME TAXES
Income Taxes	Income tax expense from continuing operations was $15.8 million for the third quarter of 2013 compared to $11.2 million in the third quarter of 2012. Income tax expense from continuing operations was $45.1 million for the nine months ended September 30, 2013 compared to $31.3 million for the nine months ended September 30, 2012. These income tax increases were driven primarily by increased earnings in 2013, with a shift in earnings to the United States driven by the acquisitions of Spartech and Glasforms, which have earnings primarily in the United States.

WeightedAverage_Shares_Used_In

Weighted-Average Shares Used In Computing Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]
Weighted-Average Shares Used In Computing Earnings Per Share	Note 9 — WEIGHTED-AVERAGE SHARES USED IN COMPUTING EARNINGS PER SHARE


		Three Months Ended September 30,		Nine Months Ended September 30,
	(In millions)	2013	2012	2013	2012
	Weighted-average shares outstanding – basic	96.7	88.8	95.4	89

	Plus dilutive impact of stock options and awards	1.4	1.4	1	1.1

	Weighted-average shares – diluted	98.1	90.2	96.4	90.1

	For the three months ended September 30, 2013 and 2012, 0.2 million and 0.5 million of equity-based awards, respectively, were excluded from the computation of diluted earnings per share because their effect would have been anti-dilutive.
	For the nine months ended September 30, 2013 and 2012, 0.6 million and 1.0 million of equity-based awards, respectively, were excluded from the computation of diluted earnings per share because their effect would have been anti-dilutive.
	During the first quarter of 2013, 0.5 million stock appreciation rights were granted under the PolyOne Corporation 2010 Equity and Performance Incentive Plan. These awards vest in one-third increments annually over a three-year service period and upon the achievement of certain stock price targets. Because not all market conditions were met as of September 30, 2013, 0.2 million of the awards were excluded from the calculation of earnings per share.

Employee_Benefit_Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2013
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Employee Benefit Plans	Note 10 — EMPLOYEE BENEFIT PLANS
	Components of defined benefit pension plan (gains) costs are as follows:


		Three Months Ended September 30,						Nine Months Ended September 30,
	(In millions)	2013			2012			2013			2012
	Service cost	$	0.4		$	0.3		$	1.2		$	1.1

	Interest cost	5.9			6.7			17.7			20.1

	Expected return on plan assets	(9.3		)	(6.9		)	(27.9		)	(20.7		)
	Net periodic benefit (gains) costs	$	(3.0	)	$	0.1		$	(9.0	)	$	0.5


	Components of post-retirement health care plan benefit costs (gains) are as follows:


		Three Months Ended September 30,						Nine Months Ended September 30,
	(In millions)	2013			2012			2013			2012
	Interest cost	$	0.2		$	0.2		$	0.6		$	0.7

	Amortization of prior service costs	—			(4.4		)	—			(13.1		)

	Net periodic benefit costs (gains)	$	0.2		$	(4.2	)	$	0.6		$	(12.4	)

Financing_Arrangements

Financing Arrangements	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
Financing Arrangements	Note 11 — FINANCING ARRANGEMENTS
	Debt consists of the following instruments:


	(Dollars in millions)	September 30, 2013		December 31, 2012 (1)
	7.500% debentures due 2015	$	48.7	$	50

	Senior secured term loan due 2017	—		294.5

	7.375% senior notes due 2020	316.6		360

	5.250% senior notes due 2023	600		—

	Other debt	22.4		2.4

	Total long-term debt	987.7		706.9

	Less current portion	9.9		3.8

	Total long-term debt, net of current portion	$	977.8	$	703.1


	-1	Book values include unamortized discounts, as applicable.
	During the third quarter of 2013, we repurchased $43.4 million aggregate principal amount of our 7.375% senior notes due 2020 and $1.3 million aggregate principal amount of our 7.50% debentures due 2015. We recognized $5.2 million of debt extinguishment costs within the Debt extinguishment costs line in our Condensed Consolidated Statements of Income in the third quarter of 2013, in connection with such repurchases.
	On February 28, 2013, PolyOne issued $600.0 million aggregate principal amount of senior notes, which mature on March 15, 2023. The senior notes bear an interest rate of 5.25% per year, payable semi-annually, in arrears, on March 15 and September 15 of each year, which commenced on September 15, 2013. We used a portion of the net proceeds of the offering to pay the cash portion of the Spartech acquisition, and to repay certain Spartech debt, including the $88.9 million aggregate principal amount of its senior notes due 2016 and related interest and make-whole payments totaling $13.4 million and all outstanding amounts under its revolving credit facility. We also used a portion of these net proceeds to make a voluntary $50.0 million contribution to our U.S. qualified defined benefit plan and to repay the outstanding principal amount of $297.0 million under our senior secured term loan.
	Debt extinguishment costs of $10.6 million related to the early retirement of our senior secured term loan included $8.2 million of deferred financing cost write-offs and $2.4 million of discount write-offs. These costs are presented within the Debt extinguishment costs line in our Condensed Consolidated Statements of Income. As a result of the issuance of our 2023 senior notes, the bridge financing commitment that provided for borrowings of $250.0 million obtained at the time of the announced acquisition of Spartech expired. We recognized $1.9 million of deferred financing costs within Interest expense, net within the Condensed Consolidated Statements of Income in the first quarter of 2013, related to this committed financing arrangement.
	On March 1, 2013, the agreement governing our $300.0 million five-year senior secured revolving credit facility was amended and restated. The amendment and restatement resulted in an increase in commitments of $100.0 million for a maximum borrowing facility size of $400.0 million, subject to a borrowing base with advances against certain U.S. and Canadian accounts receivable and inventory. We have the option to increase the availability under the facility to $450.0 million, subject to meeting certain requirements and obtaining commitments for such increase. In connection with the amendment and restatement, we also extended the maturity date to March 1, 2018. As of September 30, 2013, we were in compliance with all covenants, had no outstanding borrowings and had availability of $307.8 million under this facility.
	On October 2, 2012, the Company entered into a credit line with Saudi Hollandi Bank for $10.7 million, with an interest rate equal to the Saudi Arabia Interbank Offered Rate (SAIBOR) plus a fixed rate of 0.85%. The credit line is being used to fund capital expenditures related to the manufacturing facility in Jeddah, Saudi Arabia and is subject to an annual renewal. In 2013, the Company renewed the credit line with Saudi Hollandi Bank. As of September 30, 2013, borrowings under the credit line were $9.1 million with an interest rate of 1.85%.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]
Segment Information	Note 12 — SEGMENT INFORMATION
	As a result of the acquisition of Spartech, we created a new segment. Spartech's former Custom Sheet and Rollstock and Packaging Technology businesses are reported within this new segment referred to as "Designed Structures and Solutions", and the remaining Spartech businesses are being split among PolyOne's existing Global Specialty Engineered Materials, Global Color, Additives and Inks and Performance Products and Solutions segments.
	As a result of the sale of our Resin Business, this business has been removed from the Performance Products and Solutions segment and presented as a discontinued operation. Additionally, our Specialty Coatings business, which was previously included in the Performance Products and Solutions segment, is now included within the Global Color, Additives and Inks segment. Historical segment information has been retrospectively adjusted to reflect these changes.
	Segment information for the three and nine months ended September 30, 2013 and 2012 is as follows:


		Three Months Ended September 30, 2013								Adjusted Three Months Ended September 30, 2012
	(In millions)	Sales to		Total			Operating			Sales to		Total Sales			Operating
		External		Sales			Income			External					Income
		Customers								Customers
	Global Specialty Engineered Materials	$	177.4	$	188.8		$	15.7		$	126.9	$	136.6		$	13.1

	Global Color, Additives and Inks	216.4		219			28.7			190.5		191.1			18.6

	Designed Structures and Solutions	187.4		187.8			10.9			—		—			—

	Performance Products and Solutions	155.2		176.1			14.3			137.5		156.3			12.3

	PolyOne Distribution	272.5		275			16.6			252.8		254.4			16.4

	Corporate and eliminations	—		(37.8		)	(24.6		)	—		(30.7		)	(16.9		)

	Total	$	1,008.90	$	1,008.90		$	61.6		$	707.7	$	707.7		$	43.5




		Nine Months Ended September 30, 2013								Adjusted Nine Months Ended September 30, 2012
	(In millions)	Sales to		Total			Operating			Sales to		Total Sales			Operating
		External		Sales			Income			External					Income
		Customers								Customers
	Global Specialty Engineered Materials	$	507.1	$	540.8		$	48.2		$	385	$	417.5		$	37.7

	Global Color, Additives and Inks	648.9		653.7			83.4			603.4		605			62.6

	Designed Structures and Solutions	427.1		428.2			21.4			—		—			—

	Performance Products and Solutions	452.8		512.8			41.8			437.8		492.3			31.6

	PolyOne Distribution	811.7		818.1			49.7			783.6		788			49.8

	Corporate and eliminations	—		(106.0		)	(61.7		)	—		(93.0		)	(57.5		)

	Total	$	2,847.60	$	2,847.60		$	182.8		$	2,209.80	$	2,209.80		$	124.2




		Total Assets
	(In millions)	September 30, 2013		December 31, 2012
	Global Specialty Engineered Materials	$	476.9	$	396.6

	Global Color, Additives and Inks	963.2		901.7

	Designed Structures and Solutions	556.9		—

	Performance Products and Solutions	237.2		205.4

	PolyOne Distribution	225.4		212.9

	Corporate and eliminations	483.5		411.4

	Total assets	$	2,943.10	$	2,128.00

Commitments_And_Contingencies

Commitments And Contingencies	9 Months Ended
Commitments And Contingencies	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 13 — COMMITMENTS AND CONTINGENCIES
	Environmental — We or our subsidiaries have been notified by federal and state environmental agencies and by private parties that we may be a potentially responsible party (PRP) in connection with the investigation and remediation of certain environmental waste disposal sites. While government agencies frequently assert that PRPs are jointly and severally liable at these sites, in our experience, the interim and final allocations of liability costs are generally made based on the relative contribution of waste. We initiate corrective and preventive environmental projects of our own to ensure safe and lawful activities at our operations. We believe that compliance with current governmental regulations at all levels will not have a material adverse effect on our financial condition.
	In September 2007, we were informed of rulings by the United States District Court for the Western District of Kentucky on several pending motions in the case of Westlake Vinyls, Inc. v. Goodrich Corporation, et al., which had been pending since 2003. The Court held that PolyOne must pay the remediation costs at the former Goodrich Corporation (now Westlake Vinyls, Inc.), Calvert City facility, together with certain defense costs of Goodrich Corporation. The rulings also provided that PolyOne can seek indemnification for contamination attributable to Westlake Vinyls.
	The environmental obligation at the site arose as a result of an agreement between The B.F.Goodrich Company (nka Goodrich Corporation) and our predecessor, The Geon Company, at the time of the initial public offering in 1993, by which the Geon Company became a public company, to indemnify Goodrich Corporation for environmental costs at the site. At the time, neither PolyOne nor The Geon Company ever owned or operated the facility. Following the Court rulings, the parties to the litigation entered into settlement negotiations and agreed to settle all claims regarding past environmental costs incurred at the site. These same Court rulings and the settlement agreement provide a mechanism to allocate future remediation costs at the Calvert City facility to Westlake Vinyls, Inc. We will adjust our environmental reserve in the future, consistent with any such future allocation of costs.
	A remedial investigation and feasibility study is underway at Calvert City. During the third quarter of 2013, we submitted a remedial investigation report to the United States Environmental Protection Agency (USEPA). USEPA has required certain changes to the remedial investigation report, and revisions are ongoing. We have since undertaken steps to develop a feasibility study, including engaging a third party to perform ground water modeling at this site. We believe the results of the ongoing ground water model will allow us to begin developing remedial alternatives. As of September 30, 2013, we cannot reasonably estimate an adjustment to our current reserves because the remediation alternatives have not yet advanced to a stage where a reasonable estimate can be made. As such, it is reasonably possible that a future adjustment may have a material adverse impact to our Condensed Consolidated Statements of Income.
	On March 13, 2013, PolyOne acquired Spartech. One of Spartech's subsidiaries, Franklin-Burlington Plastics, Inc. (Franklin-Burlington), operated a plastic resin manufacturing facility in Kearny, New Jersey, located adjacent to the Lower Passaic River. Spartech acquired the owner of this facility, Franklin Plastics Corp., in a 1986 stock transaction, and Franklin Plastics Corp. subsequently became Franklin-Burlington. The USEPA has requested that companies located in the area of the Lower Passaic River, including Franklin-Burlington, cooperate in an investigation of contamination of the Lower Passaic River. In response, Franklin-Burlington and approximately 70 other companies (collectively, the Cooperating Parties) agreed, pursuant to an Administrative Order of Consent with the USEPA, to assume responsibility for completing a remedial investigation/feasibility study (RIFS) of the Lower Passaic River. The RIFS costs are exclusive of any costs that may ultimately be required to remediate the Lower Passaic River area being studied or costs associated with natural resource damages that may be assessed. By agreeing to bear a portion of the cost of the RIFS, Franklin-Burlington did not admit to or agree to bear any such remediation or natural resource damage costs. The USEPA continues to evaluate the remedial options, and the scope and cost of any remedial activity has not yet been determined.
	Given the uncertainties related to the Lower Passaic River, including the fact that the final remedial actions and scope, and the ultimate allocation to Franklin-Burlington have not yet been determined, we are not able to assess or estimate our liability, if any, related to this matter.
	During the nine months ended September 30, 2013 and 2012, PolyOne recognized $8.6 million and $9.7 million, respectively, of expense related to environmental activities at all of our active and inactive sites. During the nine months ended September 30, 2013, we received $20.1 million of proceeds from insurance recoveries compared to less than $0.1 million during the nine months ended September 30, 2012. These expenses and the gains associated with these reimbursements are included within Cost of sales within our Condensed Consolidated Statements of Income.
	Based on estimates that were prepared by our environmental engineers and consultants, our reserve balance was $76.5 million at September 30, 2013 and $75.4 million at December 31, 2012, for probable future environmental expenditures related to previously contaminated sites. The accruals represent our best estimate of the remaining probable remediation costs, based upon information and technology that is currently available and our view of the most likely remedy. Depending upon the results of future testing, the ultimate remediation alternatives undertaken, changes in regulations, new information, newly discovered conditions and other factors, it is reasonably possible that we could incur additional costs in excess of the amount accrued at September 30, 2013. However, such additional costs, if any, cannot presently be estimated.

	Other legal matters — In the third quarter of 2013, we received $7.0 million in connection with the resolution of commercial litigation in which we had an interest. We recognized this gain within the Selling and administrative expense line within our Condensed Consolidated Statements of Income in the three months ended September 30, 2013.
	Litigation Related to the Merger with Spartech — On March 5, 2013, counsel for the parties in the lawsuits entered into a memorandum of understanding, in which they agreed on the terms of a settlement of the In re Spartech Corporation Shareholder Litigation, including dismissal with prejudice and a release of all claims made therein against all defendants. Defendants agreed to the terms of the proposed settlement in order to avoid the substantial burden, expense, risk, inconvenience, and distraction of continued litigation, including the risk of delaying or adversely affecting the merger. On October 22, 2013, the parties entered into a stipulation of settlement. The proposed settlement remains conditioned upon, among other things, final approval of the proposed settlement by the Circuit Court of St. Louis County, Missouri. There can be no assurance that the court will approve the settlement, or that the settlement conditions will be met. PolyOne is insured with respect to these lawsuits.
	Guarantee — On February 28, 2011, we sold our 50% equity interest in SunBelt Chlor Alkali Partnership (SunBelt) to Olin Corporation (Olin) for $132.3 million in cash and the assumption by Olin of the obligations under our guarantee of senior secured notes issued by SunBelt of $42.7 million at the time of sale, and $30.5 million as of September 30, 2013. Unless the guarantee is formally assigned to Olin, we remain obligated under the guarantee, although Olin has agreed to indemnify us for amounts that we may be obligated to pay under the guarantee.

Fair_Value

Fair Value	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]
Fair Value	Note 14 — FAIR VALUE
	Fair value is measured based on an exit price, representing the amount that would be received to sell an asset or paid to satisfy a liability in an orderly transaction between market participants. Fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, a fair value hierarchy is established, which categorizes the inputs used in measuring fair value as follows: (Level 1) observable inputs such as quoted prices in active markets; (Level 2) inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and (Level 3) unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.
	Financial instruments accounted for at fair value on a recurring basis as of September 30, 2013 and December 31, 2012 are as follows:


		September 30, 2013
	(In millions)	Total		Quoted prices		Other		Unobservable
				in active		observable		inputs
				markets for		inputs		(Level 3)
				identical assets		(Level 2)
				(Level 1)
	Cash and cash equivalents	$	322.8	$	322.8	$	—	$	—

	Foreign currency forwards	—		—		—		—

	Foreign currency options	—		—		—		—



		December 31, 2012
	(In millions)	Total		Quoted prices		Other		Unobservable
				in active		observable		inputs
				markets for		inputs		(Level 3)
				identical assets		(Level 2)
				(Level 1)
	Cash and cash equivalents	$	210	$	210	$	—	$	—

	Foreign currency forwards	—		—		—		—

	Foreign currency options	0.6		—		0.6		—

	The fair value of derivative instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and spot and forward foreign currency rates as well as option volatility and non-performance risk.
	Other Fair Value Measurements
	The estimated fair value of PolyOne’s debt instruments at September 30, 2013 and December 31, 2012 was $983.7 million and $741.0 million, respectively, compared to carrying values of $987.7 million and $706.9 million as of September 30, 2013 and December 31, 2012, respectively. The fair value of PolyOne’s debt instruments primarily represent Level 1 measurements within the fair value hierarchy.

Derivative_Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Note 15 — DERIVATIVE INSTRUMENTS
	When translating results from foreign operations into U.S. dollars, we are subject to foreign exchange related risks in our operating results. We are also exposed to foreign exchange risk arising from intercompany lending transactions denominated in various foreign currencies that are subject to foreign exchange rate movement over the term of the loans. To mitigate these risks, we enter into foreign exchange option and forward contracts. The counterparties to these instruments are financial institutions with strong credit ratings. PolyOne maintains control over the size of positions entered into with any one counterparty and regularly monitors the credit ratings of these institutions.
	Derivative financial instruments are accounted for at fair value and recognized as assets or liabilities in the Condensed Consolidated Balance Sheets. These instruments are not designated as a hedge, and therefore, any gain or loss is immediately recognized in income.
	The fair value of derivative financial instruments recorded in the Condensed Consolidated Balance Sheets are as follows:


		September 30, 2013
	(In millions)	Notional			Other current assets
	Foreign currency options	$	6.8		$	—

	Foreign currency forwards	13			—

	Total				$	—



		December 31, 2012
	(In millions)	Notional			Other current assets
	Foreign currency options	$	31.2		$	0.6

	Foreign currency forwards	13.8			—

	Total				$	0.6

	The effects of derivative instruments on our Condensed Consolidated Statements of Income are as follows:


		Three Months Ended September 30,
	(In millions)	2013			2012			Location
	Foreign currency options losses	$	(0.2	)	$	(0.7	)	Selling and administrative expense
	Foreign currency forwards losses	(0.5		)	(0.2		)	Other expense, net



		Nine Months Ended September 30,
	(In millions)	2013			2012			Location
	Foreign currency options losses	$	(0.4	)	$	(0.6	)	Selling and administrative expense
	Foreign currency forwards - gains	0.1			—			Other expense, net

Equity

Equity	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]
Equity	Note 16 — EQUITY
	Changes in equity for the nine months ended September 30, 2013 and September 30, 2012 are as follows:


	(In millions)	PolyOne				Noncontrolling				Total
		Shareholders'				Interests				Equity
		Equity
	Balance at December 31, 2012	$	629.1			$	2.3			$	631.4

	Net income	219.2				(0.7		)		218.5

	Other comprehensive income
	Translation adjustment	(3.0		)		—				(3.0		)

	Total comprehensive income	216.2				(0.7		)		215.5

	Cash dividend declared	(16.9		)		—				(16.9		)

	Issuance of common shares in connection to the Spartech acquisition	253.8				—				253.8

	Repurchase of common shares	(95.7		)		—				(95.7		)

	Stock incentive plan activity	8.1				—				8.1

	Noncontrolling interest activity	—				0.4				0.4

	Balance at September 30, 2013	$	994.6			$	2			$	996.6


	Balance at December 31, 2011	$	588.3			$	—			$	588.3

	Net income	68.8				—				68.8

	Other comprehensive income

	Translation adjustment	(1.2		)		—				(1.2		)

	Amortization of prior service credits, net of $4.9 tax	(8.2		)		—				(8.2		)

	Total comprehensive income	59.4				—				59.4

	Cash dividend declared	(13.3		)		—				(13.3		)

	Repurchase of common shares	(15.9		)		—				(15.9		)

	Stock incentive plan activity	10.8				—				10.8

	Noncontrolling interest activity	—				2.4				2.4

	Balance at September 30, 2012	$	629.3			$	2.4			$	631.7

	On October 23, 2012, PolyOne's Board of Directors further increased the common stock repurchase authorization amount by 13.2 million shares of common stock to 20.0 million. During 2013, we repurchased approximately 3.8 million shares of common stock at an aggregate price of $95.7 million. As of September 30, 2013, there were approximately 16.2 million shares available for repurchase under these authorizations.
	Effective January 1, 2013, the Company adopted recently issued accounting guidance that requires the Company to separately disclose, on a prospective basis, the change in each component of other comprehensive income (loss) relating to reclassification adjustments to current period other comprehensive income (loss). As the new guidance relates to presentation only, the adoption did not have a material impact on the Company's results of operations, financial position or cash flows. Further, for the nine-month period ended September 30, 2013, there were no reclassifications from accumulated other comprehensive loss to other comprehensive income.
	Changes in accumulated other comprehensive loss year-to-date as of September 30, 2013 and 2012 were as follows:


	(In millions)	Cumulative Translation Adjustment				Pension and Other Post-Retirement Benefits				Unrealized Gain in Available-for-Sale Securities				Total
	Balance at January 1, 2013	$	(16.5	)		$	5.2			$	0.2			$	(11.1	)

	Translation adjustments	(3.0		)		—				—				(3.0		)

	Balance at September 30, 2013	$	(19.5	)		$	5.2			$	0.2			$	(14.1	)


Balance at January 1, 2012	$	(17.6	)		$	16.1			$	0.2			$	(1.3	)

Translation adjustments	(1.2		)		—				—				(1.2		)

Prior service credits recognized during the year, net of tax of $4.9	—				(8.2		)		—				(8.2		)

Balance at September 30, 2012	$	(18.8	)		$	7.9			$	0.2			$	(10.7	)

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 30, 2013
Accounting Policies [Abstract]
Basis of Presentation	Note 1 — BASIS OF PRESENTATION
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with Form 10-Q instructions and in the opinion of management contain all adjustments, consisting of normal recurring accruals, necessary to present fairly the financial position, results of operations and cash flows for the periods presented. The preparation of financial statements in conformity with generally accepted accounting principles, requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from these estimates. These interim financial statements should be read in conjunction with the financial statements and accompanying notes included in the annual report on Form 10-K for the year ended December 31, 2012 of PolyOne Corporation, as updated by PolyOne's current report on Form 8-K filed August 23, 2013. Throughout this document prior period amounts have been referred to as "adjusted", which accounts for the Resin Business being classified as a discontinued operation as well as the re-organization of segment information, as discussed below.
	Operating results for the three and nine months ended September 30, 2013 are not necessarily indicative of the results that may be attained in subsequent periods, or for the year ending December 31, 2013.

Business_Combinations_Tables

Business Combinations (Tables)	9 Months Ended
Business Combinations (Tables)	Sep. 30, 2013
Spartech [Member]
Business Acquisition [Line Items]
Schedule of Purchase Price Allocation	The following table summarizes PolyOne's preliminary fair value estimates as of September 30, 2013:


	(In millions)	Preliminary Allocation
	Accounts receivable, net	$	139.5
	Accounts receivable, net	$	139.5
	Inventories, net	118.3
	Inventories, net	118.3
	Other current assets	17.4
	Other current assets	17.4
	Property, net	280.5
	Property, net	280.5
	Other non-current assets	20.2
	Other non-current assets	20.2
	Intangible assets, net	44.6
	Intangible assets, net	44.6
	Goodwill	148.2
	Goodwill	148.2
	Total assets acquired	768.7
	Total assets acquired	768.7
	Short-term and current portion of long-term debt	0.5
	Short-term and current portion of long-term debt	0.5
	Accounts payable	105.2
	Accounts payable	105.2
	Accrued expenses	42.9
	Accrued expenses	42.9
	Long-term debt	11
	Long-term debt	11
	Other non-current liabilities	98
	Other non-current liabilities	98
	Total liabilities assumed	257.6
	Total liabilities assumed	257.6
	Net assets acquired	$	511.1
	Net assets acquired	$	511.1
	Based on the closing price of PolyOne's common stock on March 13, 2013, the purchase price was comprised of the following:


	(In millions, except stock price and share data)
	Spartech shares outstanding	31.2
	Spartech shares outstanding	31.2
	Spartech restricted stock units	0.2
	Spartech restricted stock units	0.2
	Spartech shares converted	31.4
	Spartech shares converted	31.4
	Exchange ratio	0.3167
	Exchange ratio	0.3167
	PolyOne shares issued	10
	PolyOne shares issued	10
	PolyOne closing stock price on March 13, 2013	$	25.05
	PolyOne closing stock price on March 13, 2013	$	25.05
	Total value of PolyOne shares issued	$	249.9
	Total value of PolyOne shares issued	$	249.9
	Cash consideration transferred to Spartech shareholders	83.4
	Cash consideration transferred to Spartech shareholders	83.4
	Fair value of Spartech equity awards, net of deferred tax benefits (1)	2.4
		2.4
	Total consideration transferred to Spartech equity holders	335.7
	Total consideration transferred to Spartech equity holders	335.7
	Spartech revolving credit facilities repaid at close (2)	77.2
	Spartech revolving credit facilities repaid at close (2)	77.2
	Spartech senior notes repaid at close (2)	102.3
	Spartech senior notes repaid at close (2)	102.3
	Total consideration transferred to debt and equity holders	515.2
	Total consideration transferred to debt and equity holders	515.2
Cash acquired	(4.1		)
Total consideration transferred to debt and equity holders, net of cash acquired	$	511.1
	$	511.1
(1) In accordance with ASC 718, Compensation — Stock Compensation, the fair value of replacement awards attributable to pre-combination service is recognized as part of purchase consideration. The $2.4 million represents the fair value of Spartech replacement equity awards of $3.9 million net of deferred tax benefits of $1.5 million. The fair value of awards attributable to post-combination service amounted to $2.7 million and are being recognized as stock compensation over their requisite service periods within PolyOne's Condensed Consolidated Statements of Income.
(2) In accordance with the provisions of Spartech's 7.08% senior notes due 2016 and revolving credit facilities, at the time of closing, PolyOne repaid all borrowings under Spartech's revolving credit facilities, which amounted to $77.2 million. Additionally, PolyOne repaid $102.3 million related to Spartech's 7.08% senior notes due 2016, including $88.9 million of aggregated principal, $10.3 million make-whole provisions, and $3.1 million of interest payable
PolyOne and Spartech [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Information	The following pro forma financial information is not necessarily indicative of the results of operations as they would have been had the transaction occurred on the assumed date, nor is it necessarily an indication of trends in future results for a number of reasons, including, but not limited to, differences between the assumptions used to prepare the pro forma information, cost savings from operating efficiencies, potential synergies, and the impact of incremental costs incurred in integrating the businesses.


		Three Months Ended September 30,				Nine Months Ended September 30,
	(In millions)	Actual 2013		Pro Forma 2012		Pro Forma 2013		Pro Forma 2012
	Sales	$	1,008.90	$	989.5	$	3,065.60	$	3,069.70
	Sales	$	1,008.90	$	989.5	$	3,065.60	$	3,069.70
	Net income from continuing operations	$	23	$	21.4	$	73.8	$	57.9
	Net income from continuing operations	$	23	$	21.4	$	73.8	$	57.9

Discontinued_Operations_Tables

Discontinued Operations (Tables)	9 Months Ended
Discontinued Operations (Tables)	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	The Resin Business' sales, income before income taxes and income from discontinued operations, net of income taxes were as follows:


		Three Months Ended September 30,						Nine Months Ended September 30,
	(In millions)	2013			2012			2013*			2012
	Sales	$	—		$	32.5		$	55.3		$	103.5
	Sales	$	—		$	32.5		$	55.3		$	103.5

	Gain on sale	$	0.1		$	—		$	223.7		$	—
	Gain on sale	$	0.1		$	—		$	223.7		$	—
	Income from operations	—			7			12.2			24.2
	Income from operations	—			7			12.2			24.2
	Income before taxes	0.1			7			235.9			24.2
	Income before taxes	0.1			7			235.9			24.2
	Income tax expense	(0.3		)	(2.4		)	(89.7		)	(8.5		)
	Income from discontinued operations, net of income taxes	$	(0.2	)	$	4.6		$	146.2		$	15.7
	Income from discontinued operations, net of income taxes	$	(0.2	)	$	4.6		$	146.2		$	15.7
	* Includes the Resin Business' operating results through May 29, 2013.

	The following table summarizes the assets and liabilities of the Resin Business as of December 31, 2012:


	(In millions)	December 31, 2012
	Assets:
	Accounts receivable, net	$	8.8
	Accounts receivable, net	$	8.8
	Inventories, net	8.2
	Inventories, net	8.2
	Property, net	21.7
	Property, net	21.7
	Other assets	0.6
	Other assets	0.6
	Assets held-for-sale	$	39.3
	Assets held-for-sale	$	39.3

	Liabilities:
	Accounts payable	$	15.8
	Accounts payable	$	15.8
	Accrued expenses	2.2
	Accrued expenses	2.2
	Liabilities held-for-sale	$	18
	Liabilities held-for-sale	$	18

Goodwill_And_Intangible_Assets1

Goodwill And Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill And Changes In Carrying Amount Of Goodwill By Operating Segment	Goodwill as of and for the periods ended September 30, 2013 and December 31, 2012, and changes in the carrying amount of goodwill by operating segments were as follows:


	(In millions)	Global Specialty				Global Color,			Designed Structures and Solutions		Performance		PolyOne		Total
		Engineered				Additives and					Products and		Distribution
		Materials				Inks					Solutions
	Balance December 31, 2011	$	89.2			$	297.3		$	—	$	7.4	$	1.6	$	395.5

	Acquisitions of businesses	10				0.6			—		—		—		10.6

	Currency translation	(0.6		)		—			—		—		—		(0.6		)

	Balance December 31, 2012	98.6				297.9			—		7.4		1.6		405.5

	Acquisitions of businesses	4.3				12.8			131.8		1.5		—		150.4

	Currency translation	(0.3		)		—			—		—		—		(0.3		)

	Balance September 30, 2013	$	102.6			$	310.7		$	131.8	$	8.9	$	1.6	$	555.6

Schedule Of Indefinite And Finite-Lived Intangible Assets	Indefinite and finite-lived intangible assets consisted of the following:


		As of September 30, 2013
	(In millions)	Acquisition				Accumulated			Currency		Net
		Cost				Amortization			Translation
	Customer relationships	$	190.4			$	(32.0	)	$	0.3	$	158.7

	Sales contracts	11.4				(10.8		)	—		0.6

	Patents, technology and other	128.5				(16.8		)	0.1		111.8

	Indefinite-lived trade names	96.3				—			—		96.3

	In-process research and development	3.4				—			—		3.4

	Total	$	430			$	(59.6	)	$	0.4	$	370.8




		As of December 31, 2012
	(In millions)	Acquisition				Accumulated			Currency		Net
		Cost				Amortization			Translation
	Customer relationships	$	173.1			$	(25.7	)	$	0.5	$	147.9

	Sales contracts	11.4				(10.8		)	—		0.6

	Patents, technology and other	89.3				(10.1		)	0.1		79.3

	Indefinite-lived trade names	96.3				—			—		96.3

	In-process research and development	15.9				—			—		15.9

	Total	$	386			$	(46.6	)	$	0.6	$	340

	The fair values of intangible assets acquired in the Spartech acquisition included in the table below were determined using an income valuation approach. The fair value of these identifiable intangible assets, useful lives and valuation methodology are as follows:


	(In millions)	Fair Value			Useful Life	Valuation Method
	Technology	$	27.3		7 years	Relief-from royalty

	Customer Relationships	17.3			20 years	Multi-period excess earnings

		$	44.6

Employee_Separation_and_Plant_1

Employee Separation and Plant Phase-out Costs Restructuring and related activities (Tables)	9 Months Ended
	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring and Related Costs [Table Text Block]	The table below summarizes restructuring activity related to Spartech since the date of acquisition.


	(In millions)	Long-Lived Asset Charges			Employee Separation			Other Costs			Total
	Accrual balance at December 31, 2012	$	—		$	—		$	—		$	—

	Charge to expense	4.8			11.6			2.1			18.5

	Cash payments	—			(3.1		)	(2.1		)	(5.2		)

	Non-cash utilization	(4.8		)	—			—			(4.8		)

	Accrual balance at September 30, 2013	$	—		$	8.5		$	—		$	8.5

Inventories_Net_Tables

Inventories, Net (Tables)	9 Months Ended
	Sep. 30, 2013
Inventory, Net [Abstract]
Components Of Inventories	Note 6 — INVENTORIES, NET
	Components of Inventories, net are as follows:


	(In millions)	September 30, 2013		December 31, 2012
	At FIFO cost:

	Finished products	$	198	$	165

	Work in process	4.1		2.4

	Raw materials and supplies	139.4		77

	Inventories, net	$	341.5	$	244.4

Property_Net_Tables

Property, Net (Tables)	9 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment [Abstract]
Components Of Property, Net	Components of Property, net are as follows:


	(In millions)	September 30, 2013			December 31, 2012
	Land and land improvements	$	52.7		$	34.7

	Buildings	315			241.4

	Machinery and equipment	1,066.60			844.5

	Property, gross	1,434.30			1,120.60

	Less accumulated depreciation and amortization	(789.9		)	(734.8		)
	Property, net	$	644.4		$	385.8

WeightedAverage_Shares_Used_In1

Weighted-Average Shares Used In Computing Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]
Schedule Of Weighted-Average Shares Used In Computing Earnings Per Share

		Three Months Ended September 30,		Nine Months Ended September 30,
	(In millions)	2013	2012	2013	2012
	Weighted-average shares outstanding – basic	96.7	88.8	95.4	89

	Plus dilutive impact of stock options and awards	1.4	1.4	1	1.1

	Weighted-average shares – diluted	98.1	90.2	96.4	90.1

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2013
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Components Of Net Period Benefit Costs	Components of defined benefit pension plan (gains) costs are as follows:


		Three Months Ended September 30,						Nine Months Ended September 30,
	(In millions)	2013			2012			2013			2012
	Service cost	$	0.4		$	0.3		$	1.2		$	1.1

	Interest cost	5.9			6.7			17.7			20.1

	Expected return on plan assets	(9.3		)	(6.9		)	(27.9		)	(20.7		)
	Net periodic benefit (gains) costs	$	(3.0	)	$	0.1		$	(9.0	)	$	0.5

Postretirement Health Care Plan Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Components Of Net Period Benefit Costs	Components of post-retirement health care plan benefit costs (gains) are as follows:


		Three Months Ended September 30,						Nine Months Ended September 30,
	(In millions)	2013			2012			2013			2012
	Interest cost	$	0.2		$	0.2		$	0.6		$	0.7

	Amortization of prior service costs	—			(4.4		)	—			(13.1		)

	Net periodic benefit costs (gains)	$	0.2		$	(4.2	)	$	0.6		$	(12.4	)

Financing_Arrangements_Tables

Financing Arrangements (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
Components Of Debt	Debt consists of the following instruments:


	(Dollars in millions)	September 30, 2013		December 31, 2012 (1)
	7.500% debentures due 2015	$	48.7	$	50

	Senior secured term loan due 2017	—		294.5

	7.375% senior notes due 2020	316.6		360

	5.250% senior notes due 2023	600		—

	Other debt	22.4		2.4

	Total long-term debt	987.7		706.9

	Less current portion	9.9		3.8

	Total long-term debt, net of current portion	$	977.8	$	703.1


	-1	Book values include unamortized discounts, as applicable.

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]
Schedule Of Segment Information	Segment information for the three and nine months ended September 30, 2013 and 2012 is as follows:


		Three Months Ended September 30, 2013								Adjusted Three Months Ended September 30, 2012
	(In millions)	Sales to		Total			Operating			Sales to		Total Sales			Operating
		External		Sales			Income			External					Income
		Customers								Customers
	Global Specialty Engineered Materials	$	177.4	$	188.8		$	15.7		$	126.9	$	136.6		$	13.1

	Global Color, Additives and Inks	216.4		219			28.7			190.5		191.1			18.6

	Designed Structures and Solutions	187.4		187.8			10.9			—		—			—

	Performance Products and Solutions	155.2		176.1			14.3			137.5		156.3			12.3

	PolyOne Distribution	272.5		275			16.6			252.8		254.4			16.4

	Corporate and eliminations	—		(37.8		)	(24.6		)	—		(30.7		)	(16.9		)

	Total	$	1,008.90	$	1,008.90		$	61.6		$	707.7	$	707.7		$	43.5




		Nine Months Ended September 30, 2013								Adjusted Nine Months Ended September 30, 2012
	(In millions)	Sales to		Total			Operating			Sales to		Total Sales			Operating
		External		Sales			Income			External					Income
		Customers								Customers
	Global Specialty Engineered Materials	$	507.1	$	540.8		$	48.2		$	385	$	417.5		$	37.7

	Global Color, Additives and Inks	648.9		653.7			83.4			603.4		605			62.6

	Designed Structures and Solutions	427.1		428.2			21.4			—		—			—

	Performance Products and Solutions	452.8		512.8			41.8			437.8		492.3			31.6

	PolyOne Distribution	811.7		818.1			49.7			783.6		788			49.8

	Corporate and eliminations	—		(106.0		)	(61.7		)	—		(93.0		)	(57.5		)

	Total	$	2,847.60	$	2,847.60		$	182.8		$	2,209.80	$	2,209.80		$	124.2




		Total Assets
	(In millions)	September 30, 2013		December 31, 2012
	Global Specialty Engineered Materials	$	476.9	$	396.6

	Global Color, Additives and Inks	963.2		901.7

	Designed Structures and Solutions	556.9		—

	Performance Products and Solutions	237.2		205.4

	PolyOne Distribution	225.4		212.9

	Corporate and eliminations	483.5		411.4

	Total assets	$	2,943.10	$	2,128.00

Fair_Value_Tables

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]
Carrying Amounts And Fair Values Of Financial Instruments	Financial instruments accounted for at fair value on a recurring basis as of September 30, 2013 and December 31, 2012 are as follows:


		September 30, 2013
	(In millions)	Total		Quoted prices		Other		Unobservable
				in active		observable		inputs
				markets for		inputs		(Level 3)
				identical assets		(Level 2)
				(Level 1)
	Cash and cash equivalents	$	322.8	$	322.8	$	—	$	—

	Foreign currency forwards	—		—		—		—

	Foreign currency options	—		—		—		—



		December 31, 2012
	(In millions)	Total		Quoted prices		Other		Unobservable
				in active		observable		inputs
				markets for		inputs		(Level 3)
				identical assets		(Level 2)
				(Level 1)
	Cash and cash equivalents	$	210	$	210	$	—	$	—

	Foreign currency forwards	—		—		—		—

	Foreign currency options	0.6		—		0.6		—

Derivative_Instruments_Tables

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value Of Derivative Financial Instruments Recorded In Condensed Consolidated Balance Sheets	The fair value of derivative financial instruments recorded in the Condensed Consolidated Balance Sheets are as follows:


		September 30, 2013
	(In millions)	Notional			Other current assets
	Foreign currency options	$	6.8		$	—

	Foreign currency forwards	13			—

	Total				$	—



		December 31, 2012
	(In millions)	Notional			Other current assets
	Foreign currency options	$	31.2		$	0.6

	Foreign currency forwards	13.8			—

	Total				$	0.6

Effects Of Derivative Instruments On Consolidated Statements Of Comprehensive Income	The effects of derivative instruments on our Condensed Consolidated Statements of Income are as follows:


		Three Months Ended September 30,
	(In millions)	2013			2012			Location
	Foreign currency options losses	$	(0.2	)	$	(0.7	)	Selling and administrative expense
	Foreign currency forwards losses	(0.5		)	(0.2		)	Other expense, net



		Nine Months Ended September 30,
	(In millions)	2013			2012			Location
	Foreign currency options losses	$	(0.4	)	$	(0.6	)	Selling and administrative expense
	Foreign currency forwards - gains	0.1			—			Other expense, net

Equity_Tables

Equity (Tables)	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]
Schedule Of Changes In Equity	Changes in equity for the nine months ended September 30, 2013 and September 30, 2012 are as follows:


	(In millions)	PolyOne			Noncontrolling			Total
		Shareholders'			Interests			Equity
		Equity
	Balance at December 31, 2012	$	629.1		$	2.3		$	631.4

	Net income	219.2			(0.7		)	218.5

	Other comprehensive income
	Translation adjustment	(3.0		)	—			(3.0		)

	Total comprehensive income	216.2			(0.7		)	215.5

	Cash dividend declared	(16.9		)	—			(16.9		)

	Issuance of common shares in connection to the Spartech acquisition	253.8			—			253.8

	Repurchase of common shares	(95.7		)	—			(95.7		)

	Stock incentive plan activity	8.1			—			8.1

	Noncontrolling interest activity	—			0.4			0.4

	Balance at September 30, 2013	$	994.6		$	2		$	996.6


	Balance at December 31, 2011	$	588.3		$	—		$	588.3

	Net income	68.8			—			68.8

	Other comprehensive income

	Translation adjustment	(1.2		)	—			(1.2		)

	Amortization of prior service credits, net of $4.9 tax	(8.2		)	—			(8.2		)

	Total comprehensive income	59.4			—			59.4

	Cash dividend declared	(13.3		)	—			(13.3		)

	Repurchase of common shares	(15.9		)	—			(15.9		)

	Stock incentive plan activity	10.8			—			10.8

	Noncontrolling interest activity	—			2.4			2.4

	Balance at September 30, 2012	$	629.3		$	2.4		$	631.7

Schedule of Accumulated Other Comprehensive Income (Loss)	Changes in accumulated other comprehensive loss year-to-date as of September 30, 2013 and 2012 were as follows:


	(In millions)	Cumulative Translation Adjustment			Pension and Other Post-Retirement Benefits			Unrealized Gain in Available-for-Sale Securities			Total
	Balance at January 1, 2013	$	(16.5	)	$	5.2		$	0.2		$	(11.1	)

	Translation adjustments	(3.0		)	—			—			(3.0		)

	Balance at September 30, 2013	$	(19.5	)	$	5.2		$	0.2		$	(14.1	)


	Balance at January 1, 2012	$	(17.6	)	$	16.1		$	0.2		$	(1.3	)

	Translation adjustments	(1.2		)	—			—			(1.2		)

	Prior service credits recognized during the year, net of tax of $4.9	—			(8.2		)	—			(8.2		)

	Balance at September 30, 2012	$	(18.8	)	$	7.9		$	0.2		$	(10.7	)

Basis_Of_Presentation_Basis_of

Basis Of Presentation Basis of Presentation (Details) (USD $)	9 Months Ended	0 Months Ended	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2012	30-May-13	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013
	Sep. 30, 2012	Resin Business [Member]	Resin Business [Member]	Resin Business [Member]	Resin Business [Member]
Business Divestiture [Line Items]
Proceeds from divestiture of business		$250
Gain on sale before tax	0	223.7	0.1	0	223.7
Gain on sale, net of tax		$138

Business_Combinations_Narrativ

Business Combinations Narrative (Details) (USD $)

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

12 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Mar. 13, 2013

Nov. 03, 2012

Sep. 30, 2013

Dec. 19, 2012

Dec. 31, 2012

Sep. 30, 2013

Feb. 28, 2013

Spartech [Member]

Various Spartech Businesses [Member]

Glasforms, Inc. [Member]

Senior Notes [Member]

5.250% Senior Notes Due 2023 [Member]

Business Acquisition [Line Items]

Payments to Acquire Businesses, Gross

$1.20

Cash Acquired from Acquisition

4.1

Revenue reported by acquired entity for last annual period

1,149.40

Net income from continuing operations

2.7

Business acquisition, aggregate consideration transferred for each common share

$2.67

Exchange ratio

0.3167

Cash consideration transferred to Spartech Shareholders

83.4

PolyOne shares issued

10,000,000

Stated interest rate

7.08%

5.25%

Sales

260.8

593

Fair value of Spartech equity awards, net of deferred tax benefits

2.4

Fair Value of Spartech Equity Awards, before deferred tax benefits

3.9

Deferred tax benefit

1.5

Vested in period, total fair value

2.7

Line of Credit Facility, Decrease, Repayments

77.2

Early repayment of senior debt

102.3

Business acquisition, repayment of senior notes.

88.9

Make-whole provision

10.3

Interest payable

3.1

Sales

1,008.90

707.7

2,847.60

2,209.80

51.1

Business Combination, Consideration Transferred

335.7

34.3

Goodwill

148.2

12.8

Amortizable intangible assets

44.6

10.7

Acquisition related costs

7.2

Goodwill, Purchase Accounting Adjustments

$5.50

Business_Combinations_Purchase

Business Combinations (Purchase Price Allocation) (Details) (USD $)	9 Months Ended		0 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Mar. 13, 2013	Mar. 13, 2013
			Spartech [Member]	Restricted Stock Units (RSUs) [Member]
				Spartech [Member]
Business Acquisition, Cost of Acquired Entity, Purchase Price [Abstract]
Spartech shares outstanding			31,200,000
Spartech restricted stock units				200,000
Spartech shares to be converted			31,400,000
Exchange ratio			0.3167
PolyOne shares issued			10,000,000
PolyOne closing stock price on March 13, 2013			$25.05
Total value of PolyOne shares issued			($249.90)
Cash consideration transferred to Spartech Shareholders			83.4
Fair value of Spartech equity awards, net of deferred tax benefits			2.4
Total consideration transferred to Spartech equity holders			335.7
Spartech revolving credit facilities repaid at close (2)			77.2
Spartech senior notes repaid at close (including make-whole provisions and interest payable)			102.3
Total consideration transferred to debt and equity holders			515.2
Cash acquired			-4.1
Total consideration transferred to debt and equity holders, net of cash acquired	$259.40	$0	$511.10

Business_Combinations_PolyOnes

Business Combinations PolyOne's preliminary estimates of the fair value as of June 30, 2013 (Details) (Spartech [Member], USD $)	Sep. 30, 2013
In Millions, unless otherwise specified	Sep. 30, 2013
Spartech [Member]
Business Acquisition [Line Items]
Accounts receivable, net	$139.50
Inventories, net	118.3
Other current assets	17.4
Property, net	280.5
Other non-current assets	20.2
Intangible assets, net	44.6
Goodwill	148.2
Total assets acquired	768.7
Short-term and current portion of long-term debt	0.5
Accounts payable	105.2
Accrued expenses	42.9
Long-term debt	11
Other non-current liabilities	98
Total Liabilities assumed	257.6
Net assets acquired	$511.10

Business_Combinations_Business

Business Combinations Business Aquisition, Pro Forma (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Sales Revenue, Goods, Net	$1,008.90	$707.70	$2,847.60	$2,209.80
Income (Loss) from Continuing Operations Attributable to Parent	23	19.4	72.3	53.1
Spartech [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Sales		989.5	3,065.60	3,069.70
Net income from continuing operations		$21.40	$73.80	$57.90

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	30-May-13	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Gain on sale					$0
Income from discontinued operations, net of income taxes		-0.2	4.6	146.2	15.7
Resin Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of business	250
Gain on sale, net of tax	138
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Sales			32.5	55.3	103.5
Gain on sale	223.7	0.1	0	223.7
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax		0	7	12.2	24.2
Income before income taxes		0.1	7	235.9	24.2
Income tax expense		-0.3	-2.4	-89.7	-8.5
Income from discontinued operations, net of income taxes		-0.2	4.6	146.2	15.7
Disposal Group, Including Discontinued Operation, Unclassified Balance Sheet Disclosures [Abstract]
Accounts receivable, net						8.8
Inventories, net						8.2
Property, net						21.7
Other assets						0.6
Assets held-for-sale						39.3
Accounts payable						15.8
Accrued expenses						2.2
Liabilities held-for-sale						$18

Goodwill_And_Intangible_Assets2

Goodwill And Intangible Assets (Goodwill And Changes In Carrying Amount Of Goodwill By Operating Segment) (Details) (USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Balance, beginning of period	$405.50	$395.50
Acquisitions of businesses	150.4	10.6
Currency translation	-0.3	-0.6
Balance, end of period	555.6	405.5
Global Specialty Engineered Materials [Member]
Goodwill [Roll Forward]
Balance, beginning of period	98.6	89.2
Acquisitions of businesses	4.3	10
Currency translation	-0.3	-0.6
Balance, end of period	102.6	98.6
Global Color, Additives And Inks [Member]
Goodwill [Roll Forward]
Balance, beginning of period	297.9	297.3
Acquisitions of businesses	12.8	0.6
Currency translation	0	0
Balance, end of period	310.7	297.9
Designed Structures and Solutions [Member]
Goodwill [Roll Forward]
Balance, beginning of period	0	0
Acquisitions of businesses	131.8	0
Currency translation	0	0
Balance, end of period	131.8	0
Performance Products And Solutions [Member]
Goodwill [Roll Forward]
Balance, beginning of period	7.4	7.4
Acquisitions of businesses	1.5	0
Currency translation	0	0
Balance, end of period	8.9	7.4
PolyOne Distribution [Member]
Goodwill [Roll Forward]
Balance, beginning of period	1.6	1.6
Acquisitions of businesses	0	0
Currency translation	0	0
Balance, end of period	$1.60	$1.60

Goodwill_And_Intangible_Assets3

Goodwill And Intangible Assets (Schedule Of Indefinite And Finite-Lived Intangible Assets) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Indefinite And Finite-Lived Intangible Assets [Line Items]
Intangible assets total, Acquisition Cost	$430	$386
Finite-lived intangible assets, Accumulated Amortization	-59.6	-46.6
Intangible assets, Currency Translation	0.4	0.6
Finite-lived intangible assets, Net	370.8	340
Customer relationships [Member]
Indefinite And Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Acquisition Cost	190.4	173.1
Finite-lived intangible assets, Accumulated Amortization	-32	-25.7
Finite-lived intangible assets, Currency Translation	0.3	0.5
Finite-lived intangible assets, Net	158.7	147.9
Sales contracts [Member]
Indefinite And Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Acquisition Cost	11.4	11.4
Finite-lived intangible assets, Accumulated Amortization	-10.8	-10.8
Finite-lived intangible assets, Currency Translation	0	0
Finite-lived intangible assets, Net	0.6	0.6
Patents, technology And other [Member]
Indefinite And Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Acquisition Cost	128.5	89.3
Finite-lived intangible assets, Accumulated Amortization	-16.8	-10.1
Finite-lived intangible assets, Currency Translation	0.1	0.1
Finite-lived intangible assets, Net	111.8	79.3
Indefinite-lived trade names [Member]
Indefinite And Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, Acquisition Cost	96.3	96.3
Indefinite-lived intangible assets, Currency Translation	0	0
Finite-lived intangible assets, Net	96.3	96.3
In-process research and development [Member]
Indefinite And Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, Acquisition Cost	3.4	15.9
Indefinite-lived intangible assets, Currency Translation	0	0
Finite-lived intangible assets, Net	$3.40	$15.90

Goodwill_And_Intangible_Assets4

Goodwill And Intangible Assets Goodwill and Intangibles Fair Value of Spartech Intangible Assets (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Finite - Intangible Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets	27.3
Aquired Finite-Intangible [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets	17.3
Spartech [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets	44.6
Finite-Intangible Asset Useful Life [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	7 years
Finite-Intangible Useful Lifes [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	20 years

Employee_Separation_and_Plant_2

Employee Separation and Plant Phase-out Costs Employee Seperation and Plant Phaseout Costs (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Jul. 10, 2013

Patents [Member]

Cost of Goods, Total [Member]

Selling, General and Administrative Expenses [Member]

Business Acquisition, Acquiree [Domain]

north american realignment [Member]

Spartech [Member]

Various Spartech Businesses [Member]

Parent Company [Member]

Minimum [Member]

Maximum [Member]

Restructuring Cost and Reserve [Line Items]

Spartech Restructuring, time period

12 months

18 months

Restructuring and Related Cost, Expected Cost

$35

Payments for Restructuring

-2.1

-5.2

Restructuring Costs and Asset Impairment Charges

-4.8

Severance Costs

1.3

11.6

10.5

1.8

9.8

Other Restructuring Costs

6.9

2.1

5.1

Restructuring Charges

4.8

23.7

4.8

18.9

18.5

5.2

Severance Cash Payment

-3.1

Restructuring Reserve, Accelerated Depreciation

1.8

Restructuring Reserve

$8.50

Inventories_Net_Components_Of_

Inventories, Net (Components Of Inventories) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Inventory, Net [Abstract]
Finished products	$198	$165
Work in process	4.1	2.4
Raw materials and supplies	139.4	77
Inventories, net	$341.50	$244.40

Property_Net_Details

Property, Net (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, gross	$1,434.30	$1,120.60
Less accumulated depreciation and amortization	-789.9	-734.8
Property, net	644.4	385.8
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, gross	52.7	34.7
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, gross	315	241.4
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, gross	$1,066.60	$844.50

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Income tax expense, continuing operations	($15.80)	($11.20)	($45.10)	($31.30)

WeightedAverage_Shares_Used_In2

Weighted-Average Shares Used In Computing Earnings Per Share (Schedule Of Weighted-Average Shares Used In Computing Earnings Per Share) (Details)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Weighted-average shares outstanding - basic	96.7	88.8	95.4	89
Plus dilutive impact of stock options and awards	1.4	1.4	1	1.1
Weighted-average shares - diluted	98.1	90.2	96.4	90.1

WeightedAverage_Shares_Used_In3

Weighted-Average Shares Used In Computing Earnings Per Share (Narrative) (Details)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013	Sep. 30, 2013	Sep. 30, 2013	Mar. 31, 2013
					SARs [Member]	SARs [Member]	SARs [Member]	Contingently Issuable Shares [Member]
							Vests Rateably over Three Years [Member]
Weighted-Average Shares Used In Computing Earnings Per Share[Line Items]
Antidilutive securities excluded from computation of EPS	0.2	0.5	0.6	1
Stock Issued During Period, Shares, Restricted Stock Award, Gross					0.5
Shares granted under stock appreciation rights (SARs) and Performance Incentive plan								0.2
Award vesting rights percentage							33.33%
Vesting period						3 years

Employee_Benefit_Plans_Compone

Employee Benefit Plans (Components Of Net Period Benefit Costs) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$0.40	$0.30	$1.20	$1.10
Interest cost	5.9	6.7	17.7	20.1
Expected return on plan assets	-9.3	-6.9	27.9	-20.7
Net periodic benefit costs (gains)	-3	0.1	-9	0.5
Postretirement Health Care Plan Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.2	0.2	0.6	0.7
Amortization of prior service costs	0	-4.4	0	-13.1
Net periodic benefit costs (gains)	$0.20	($4.20)	$0.60	($12.40)

Financing_Arrangements_Compone

Financing Arrangements (Components Of Long-Term Debt) (Details) (USD $)

3 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Feb. 28, 2013

Dec. 31, 2012

7.500% Debentures Due 2015 [Member]

Senior Secured Term Loan Due 2017 [Member]

7.375% Senior Notes Due 2020 [Member]

Senior Notes Due Two Thousand And Fifteen [Member]

5.250% Senior Notes Due 2023 [Member]

Convertible Debt [Member]

Senior Notes [Member]

Debt Instrument [Line Items]

Debt Instrument, Repurchase Amount

$43.40

$1.30

Total long-term debt

987.7

706.9

[1]

48.7

[1]

294.5

[1]

316.6

360

[1]

600

[1]

Other Long-term Debt

22.4

2.4

[1]

Long-term Debt, Fair Value

983.7

741

Less current portion

9.9

3.8

[1]

Total long-term debt, net of current portion

977.8

703.1

[1]

Interest rate of senior notes, debentures and medium-term notes

7.50%

7.38%

7.50%

5.25%

Maturity date of debt instrument

2015

2017

2020

2023

Debt Extinguishment Costs

$5.20

$15.80

$10.60

[1]

Book values include unamortized discounts, as applicable.

Financing_Arrangements_Narrati

Financing Arrangements (Narrative) (Details) (USD $)

3 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2013

Mar. 01, 2013

Sep. 30, 2013

Oct. 02, 2012

Oct. 23, 2012

Sep. 30, 2013

Mar. 02, 2013

Mar. 01, 2013

Mar. 13, 2013

Sep. 30, 2013

Feb. 28, 2013

Sep. 30, 2013

Revolving Credit Facility [Member]

Saudi Hollandi Bank [Member]

Bank of America, NA, Merrill Lunch, Pierce, Fenner and Smith Incorporated, Wells Fargo Securities, LLC and WF Investment Holdings, LLC [Member]

Various Banks [Member]

Spartech [Member]

5.250% Senior Notes Due 2023 [Member]

Senior Secured Term Loan Due 2017 [Member]

Bridge Loan [Member]

Revolving Credit Facility [Member]

Senior Notes [Member]

Debt Instrument [Line Items]

Short-term Debt, Percentage Bearing Fixed Interest Rate

0.85%

Face amount

$600,000,000

Stated interest rate

7.08%

5.25%

Business acquisition, repayment of senior notes.

88,900,000

Senior note repayment, interest and make - whole costs

13,400,000

Contributions by employer

50,000,000

Early repayment of senior debt

102,300,000

297,000,000

Payments of Debt Extinguishment Costs

5,200,000

15,800,000

10,600,000

Write off of deferred debt issuance cost

8,200,000

Write-off of deferred financing costs and debt discounts

2,400,000

Line of credit facility, maximum borrowing capacity

300,000,000

10,700,000

250,000,000

400,000,000

Deferred finance costs, net

1,900,000

Line of credit facility term

5 years

Increase (decrease), other, net

100,000,000

Line of Credit Facility, Potential maximum Borrowing Capacity

450,000,000

Current borrowing availability

307,800,000

Interest rate at period end

1.85%

Amount outstanding

$9,100,000

Segment_Information_Schedule_O

Segment Information (Schedule Of Segment Information) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Sales to External Customers	$1,008.90	$707.70	$2,847.60	$2,209.80
Total Sales	1,008.90	707.7	2,847.60	2,209.80
Operating Income	61.6	43.5	182.8	124.2
Total Assets	2,943.10		2,943.10		2,128
Global Specialty Engineered Materials [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	177.4	126.9	507.1	385
Total Sales	188.8	136.6	540.8	417.5
Operating Income	15.7	13.1	48.2	37.7
Total Assets	476.9		476.9		396.6
Global Color, Additives And Inks [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	216.4	190.5	648.9	603.4
Total Sales	219	191.1	653.7	605
Operating Income	28.7	18.6	83.4	62.6
Total Assets	963.2		963.2		901.7
Designed Structures and Solutions [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	187.4	0	427.1	0
Total Sales	187.8	0	428.2	0
Operating Income	10.9	0	21.4	0
Total Assets	556.9		556.9		0
Performance Products And Solutions [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	155.2	137.5	452.8	437.8
Total Sales	176.1	156.3	512.8	492.3
Operating Income	14.3	12.3	41.8	31.6
Total Assets	237.2		237.2		205.4
PolyOne Distribution [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	272.5	252.8	811.7	783.6
Total Sales	275	254.4	818.1	788
Operating Income	16.6	16.4	49.7	49.8
Total Assets	225.4		225.4		212.9
Corporate And eliminations [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	0	0	0	0
Total Sales	-37.8	-30.7	-106	-93
Operating Income	-24.6	-16.9	-61.7	-57.5
Total Assets	$483.50		$483.50		$411.40

Commitments_And_Contingencies_

Commitments And Contingencies (Details) (USD $)	9 Months Ended			1 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Feb. 28, 2011	Sep. 30, 2013
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sunbelt [Member]	Sunbelt [Member]
Schedule of Equity Method Investments [Line Items]
Expense related to environmental activities	$8.60	$9.70
Proceeds from insurance recoveries	20.1	0.1
Accrued probable future environmental expenditures	76.5		75.4
Proceeds from Legal Settlements	7
Equity interest sold, percentage				50.00%
Consideration received on transaction				132.3
Net amount at risk by product and guarantee				42.7
Guarantee assumed By acquirer					$30.50

Fair_Value_Carrying_Amounts_An

Fair Value (Carrying Amounts And Fair Values Of Financial Instruments) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012		Sep. 30, 2012	Dec. 31, 2011
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012		Sep. 30, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	$987.70	$706.90	[1]
Cash and Cash Equivalents, at Carrying Value	322.8	210		248.7	191.9
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, at Carrying Value	322.8
Cash equivalents		210
Quoted prices In active mrkets for identical assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	322.8	210
Other observable inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Unobservable inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Foreign currency options [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency	0	0.6
Foreign currency options [Member] \| Quoted prices In active mrkets for identical assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency	0	0
Foreign currency options [Member] \| Other observable inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency	0	0.6
Foreign currency options [Member] \| Unobservable inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency	0	0
Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency	0
Foreign Exchange Forward [Member] \| Quoted prices In active mrkets for identical assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency	0
Foreign Exchange Forward [Member] \| Other observable inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency	$0

[1]	Book values include unamortized discounts, as applicable.

Fair_Value_Narrative_Details

Fair Value (Narrative) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Long-term Debt, Fair Value	$983.70	$741
Debt carrying value	$987.70	$706.90	[1]

[1]	Book values include unamortized discounts, as applicable.

Derivative_Instruments_Fair_Va

Derivative Instruments (Fair Value Of Derivative Financial Instruments Recorded In Condensed Consolidated Balance Sheets) (Details) (USD $)

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

In Millions, unless otherwise specified

Foreign currency options [Member]

Foreign currency forwards [Member]

Selling and administrative expense [Member]

Other Expense Net [Member]

Foreign currency options [Member]

Foreign currency forwards [Member]

Derivatives, Fair Value [Line Items]

Notional

$6.80

$31.20

$13

$13.80

Other Current Assets

0.6

Gain/(loss) recognized in income

($0.20)

($0.70)

($0.40)

($0.60)

($0.50)

($0.20)

$0.10

Equity_Rollforward_Details

Equity Rollforward (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement, Equity Component [Line Items]
Net Income (Loss) Attributable to Parent	$23	$24	$219.20	$68.80
Statement, Equity Component [Roll Forward]
Balance at the beginning			631.4	588.3
Net income (loss)	22.8	24	218.5	68.8
Translation adjustment	7.7	4.2	-3	-1.2
Prior service credits recognized during the year, net of tax	0	-2.7	0	-8.2
Total comprehensive income	30.5	25.5	215.5	59.4
Cash dividend declared			-16.9	-13.3
Total value of PolyOne shares issued	253.8		253.8
Repurchase of common shares			-95.7	-15.9
Stock incentive plan activity			8.1	10.8
Noncontrolling interest activity			0.4	2.4
Balance at the ending	996.6	631.7	996.6	631.7
Amortization of prior service costs, tax				3.2
PolyOne Shareholders' Equity [Member]
Statement, Equity Component [Roll Forward]
Balance at the beginning			629.1	588.3
Net income (loss)				68.8
Translation adjustment			-3	-1.2
Prior service credits recognized during the year, net of tax				-8.2
Total comprehensive income			216.2	59.4
Cash dividend declared			-16.9	-13.3
Total value of PolyOne shares issued	253.8		253.8
Repurchase of common shares			-95.7	-15.9
Stock incentive plan activity			8.1	10.8
Noncontrolling interest activity			0	0
Balance at the ending	994.6	629.3	994.6	629.3
Noncontrolling Interests [Member]
Statement, Equity Component [Roll Forward]
Balance at the beginning			2.3	0
Net income (loss)			-0.7	0
Translation adjustment			0	0
Prior service credits recognized during the year, net of tax				0
Total comprehensive income			-0.7	0
Cash dividend declared			0	0
Total value of PolyOne shares issued	0		0
Repurchase of common shares			0	0
Stock incentive plan activity			0	0
Noncontrolling interest activity			0.4	2.4
Balance at the ending	$2	$2.40	$2	$2.40

Equity_Narrative_Details

Equity Narrative (Details) (USD $)	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Oct. 23, 2012
Equity [Abstract]
Increase in common share repurchase authorization			13,200,000
Remaining number of shares authorized to be repurchased	16,200,000		20,000,000
Stock repurchased during period	3,800,000
Payments for repurchase of common stock	$95.70	$15.90

Rollforward_of_Accumulated_Oth

Rollforward of Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative Translation Adjustment, Balance at beginning of period			($16.50)	($17.60)
Translation adjustments			-3	-1.2
Cumulative Translation Adjustment, Balance at end of period	-19.5	-18.8	-19.5	-18.8
Pension and Other Post-Retirement Benefits, Balance at beginning of period			5.2	16.1
Prior service credits recognized during the year, net of tax $4.9 tax	0	-2.7	0	-8.2
Pension and Other Post-Retirement Benefits, Balance at end of period	5.2	7.9	5.2	7.9
Unrealized Gain in Available-for-Sale Securities, Balance at beginning of period			0.2	0.2
Unrealized Gain in Available-for-Sale Securities, Balance at end of period	0.2	0.2	0.2	0.2
Total, Balance at beginning of period			-11.1	-1.3
Total, Balance at end of period	($14.10)	($10.70)	($14.10)	($10.70)