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Income Taxes Quarterly (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Tax (Details) [Abstract]
Income tax expense	$ 31.0	$ 34.3	$ 56.8	$ 69.4
Effective Income Tax Rate Continuing Operations	34.60%	34.20%	32.70%	35.80%
Income Tax Reconciliation Other Adjustments	$ (3.4)	$ 2.7

- 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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