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Consolidated Statement of Equity (Parentheticals) (USD $) In Millions, except Per Share data, unless otherwise specified | Dec. 31, 2011
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Statement of Stockholders' Equity [Abstract] |
Impact of Restatement on Opening Retained Earnings, Net of Tax | $ 51.1 us-gaap_ImpactOfRestatementOnOpeningRetainedEarningsNetOfTax

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