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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 31, 2012	Mar. 31, 2012
Income Taxes [Abstract]
Effective income tax rate	6.00%	12.00%
Tax benefit recognized related to favorable settlement of a foreign tax exam	$ 6.4
Reserves for uncertain tax positions		8.1
Estimated accrued interest and penalties	$ 2.1	$ 2.1

- Definition

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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