Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	0 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 30, 2013
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Sales	$ 0	$ 55.3	$ 131.8
Gain on sale	0	223.7	0
Income from operations	0	12.2	29.7
Income before taxes	0	235.9	29.7
Income tax benefit (expense)	1.2	(86.1)	(11.1)
Income from discontinued operations, net of income taxes	1.2	149.8	18.6
Resin Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses				250.0
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax				139.7
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Gain on sale				$ 223.7

Amount of gain (loss), before tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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Pretax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Amount of operating income or loss attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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