Acquisitions (Pro Forma Condensed Consolidated Income Statement Information) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Acquisitions [Abstract]
Net service revenue	$ 1,504.7	$ 1,684.9
Operating (loss) income	(468.2)	218.3
Net (loss) income	$ (381.8)	$ 115.3
Basic (loss) earnings per share	$ (13.30)	$ 4.11
Diluted (loss) earnings per share	$ (13.30)	$ 4.05

Business acquisition pro forma information operating income.

No definition available.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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