Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Consolidated net income (loss)	$ 50.1	$ 41.5	$ 156.0	$ 198.2
Changes in other comprehensive (loss) income, net of tax:
Currency translation adjustment (1)	(56.6)	29.2	(61.6)	43.3
Pension and postretirement	1.7	0.9	3.1	2.7
Change in net unrealized gain on derivative instruments	0.1	0.3	2.0	1.5
Total changes in other comprehensive (loss) income, net of tax	(54.8)	30.4	(56.5)	47.5
Consolidated comprehensive (loss) income	(4.7)	71.9	99.5	245.7
Less: Comprehensive income attributable to noncontrolling interests	0.0	0.9	2.3	3.2
Comprehensive income (loss)	$ (4.7)	$ 71.0	$ 97.2	$ 242.5