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Income Tax Expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Expense [Abstract]
Earnings from continuing operations before income taxes	$ 56.5	$ 63.6	$ 71.6	$ 95.9
Income tax expense	$ 25.9	$ 21.4	$ 37.8	$ 34.7
Effective tax rate	45.80%	33.60%	52.80%	36.20%

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

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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