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Supplemental Disclosures (Narrative) (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
Supplemental Disclosures [Abstract]
Effective tax rate	36.50%	23.80%	31.00%	48.60%
Reduction to income tax expense due to settlements				$ 61.0
Income tax refunds			$ 1.3	$ 0.9

- 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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