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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			1 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Aug. 31, 2012 Domestic Tax Authority [Member]	Jun. 30, 2013 Maximum
Income Tax Disclosures [Line Items]
Provision (benefit) for taxes on income	$ 9.3	$ 15.5	$ 17.8	$ 26.9
Federal income tax at statutory rate			35.00%
Unrecognized Tax Benefits	38.7		38.7		55.8
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities During Next Twelve Months			6.9
Income Tax Examination, Loss Disallowed from Deductions						380.9
Income Tax Examination, Estimate of Possible Loss							$ 134.0

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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