Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Earnings Including Redeemable Noncontrolling Interest	$ 44.2	$ 39.3
Hedging adjustments:
Reclassifications to net earnings	0.0	0.5
Foreign currency translation adjustments:
Unrealized foreign currency translation adjustments	1.5	(0.4)
Total Other Comprehensive Income Including Redeemable Noncontrolling Interest	1.5	0.1
Less: Comprehensive income attributable to redeemable noncontrolling interest	0.0	31.2
Total Comprehensive Income Available to Common Stockholders	$ 45.7	$ 8.2