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Consolidated Statements of Changes in Total Equity (Parenthetical) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Consolidated Statements of Changes in Total Equity [Abstract] |  |  |
Offering costs from follow-on public offer | $ 14.9 |  | $ 7.6
Offering costs for direct equity placement |  | $ 0.1 |
Percentage Interest on Sale | 1.00% |  | 1.00%

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- Definition Offering costs from follow-on public offer. + References No definition available. + Details
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- Definition Offering costs for direct equity placement. + References No definition available. + Details
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- Definition Percentage of ownership interest sold in subsidiaries. + References No definition available. + Details
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- Details
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