Income Taxes (Estimated Effective Income Tax Rate) (Details)	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Income Taxes
Continuing operations	26.90%	29.40%
Discontinued operations	26.20%	28.30%
Consolidated overall	26.90%	29.40%

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 47

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Subparagraph 2
-Article 4

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Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration