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INCOME TAX EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
INCOME TAX EXPENSE
Effective income tax rate	11.00%	11.40%	16.90%	19.40%
Increase (decrease) in valuation allowance (as a percent)	(14.30%)	12.90%	(8.20%)	5.90%
Reduction in valuation allowance for excess foreign tax credits	$ 2.8	$ 2.3
Amended return receivable		$ 0.2

X

- Definition

Amount of amended return benefit from increase in foreign tax credits.

+ References

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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