XML 8 R50.htm IDEA: XBRL DOCUMENT

Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Income Taxes
Effective income tax rate	32.70%	38.60%	32.80%	38.10%
Change in income tax rate	1.00%		(4.00%)
Increase in state income taxes and uncertain tax positions	$ 32.8
Decline in state income taxes and uncertain tax positions			$ 66.2

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.

+ References+ Details

- Definition

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit that is attributable to changes in the income tax laws or rates.

+ References+ Details