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. This ratio excludes the impact of the French Business Tax.

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A ratio calculated by dividing the expected annual income tax expense attributable to continuing operations by GAAP-basis forecast pretax income from continuing operations. This ratio represents the effective income tax rate that the Company expects to realize for the fiscal year, as of the balance sheet date.

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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.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority.

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-Name Accounting Standards Codification

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Identification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.

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-Publisher FASB

-Name FASB Interpretation (FIN)

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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-Publisher FASB

-Name FASB Interpretation (FIN)

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-Glossary Unrecognized Tax Benefit

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This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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-Name FASB Interpretation (FIN)

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Effective income tax rate	45.90%	48.90%	47.90%	53.70%
Effective income tax rate, excluding French Business Tax	36.00%		37.00%
U.S. Federal statutory rate	35.00%
Expected annual effective income tax rate					47.00%
Income Tax Contingency [Line Items]
Gross unrecognized tax benefits	$ 27.4		$ 27.4			$ 26.4
Interest and penalties	1.5		1.5			1.4
Related tax benefits	4.3		4.3			4.3
Unrecognized tax benefits that would favorably impact effective tax rate if recognized	$ 23.1		$ 23.1
Tax years subject to tax examination	2007 through 2011