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Basis of Presentation (Details) (USD $) In Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2010 | Sep. 30, 2010 | Sep. 30, 2011 | Dec. 31, 2010
Basis of Presentation [Abstract] |  |  |  |
Revenue reclassification adjustment | $ (7.4) | $ (17.8) |  |
Office and general expense reclassification adjustment | (7.4) | (17.8) |  |
Accounts payable adjustment |  |  | 2,316.2 | 2,332.2
Accrued liabilities adjustment |  |  | $ (2,316.2) | $ (2,332.2)

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- Definition Accounts payable adjustment + Details
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- Definition Accrued liabilities adjustment + Details
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- Definition Reclassification adjustment of office and general expense from a gross to a net basis + Details
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- Definition Reclassification adjustment of revenue from a gross to a net basis + Details
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