Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Earnings Including Redeemable Noncontrolling Interest	$ 30.9	$ 3.9	$ 75.1	$ 43.2
Hedging adjustments:
Reclassifications to net earnings	0.0	6.6	0.0	7.1
Foreign currency translation adjustments:
Unrealized foreign currency translation adjustments	0.3	(0.4)	1.8	(0.8)
Tax expense on other comprehensive income:
Reclassifications to net earnings	0.0	(0.4)	0.0	(0.4)
Total Other Comprehensive Income Including Redeemable Noncontrolling Interest	0.3	5.8	1.8	5.9
Less: Comprehensive income attributable to redeemable noncontrolling interest	0.0	7.1	0.0	38.3
Total Comprehensive Income Available to Common Stockholders	$ 31.2	$ 2.6	$ 76.9	$ 10.8