Schedule of Income Taxes Paid and Refunded (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes Paid, Net [Abstract]
Income Taxes Paid	$ 15.1us-gaap_IncomeTaxesPaid	$ 21.4us-gaap_IncomeTaxesPaid	$ 101.7us-gaap_IncomeTaxesPaid
Income tax refunds received	(20.2)us-gaap_ProceedsFromIncomeTaxRefunds	(18.3)us-gaap_ProceedsFromIncomeTaxRefunds	(15.8)us-gaap_ProceedsFromIncomeTaxRefunds
Income Taxes Paid (Received), Net, Total	(5.1)us-gaap_IncomeTaxesPaidNet	3.1us-gaap_IncomeTaxesPaidNet	85.9us-gaap_IncomeTaxesPaidNet
Income tax refund expected	60us-gaap_IncomeTaxReceivable
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	76
Tax credit carryforwards	$ 33.5

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-SubTopic 10

-Section S99

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The amount of cash received during the period as refunds for the overpayment of taxes.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 230

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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