Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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- Definition

Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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+ Details

Discontinued Operations (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2022	Jun. 30, 2021
Discontinued Operations [Line Items]
Income from discontinued operations, net of tax	$ 0.0	$ 8.2		$ 0.0	$ 18.5
Cash provided by discontinued operations, tax settlement refund				$ 0.0	$ 6.7
EfW \| Discontinued operations
Discontinued Operations [Line Items]
Tax benefit related to release of uncertain tax positions		$ 8.2
PMD \| Discontinued operations
Discontinued Operations [Line Items]
Tax benefit related to settlement			$ 10.3