Employee Benefit Plans - Schedule of Changes in The Benefit Obligations and Plan Assets, The Funded Status of The Plans and The Amounts Recognized in The Balance Sheet (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
	Oct. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Sep. 30, 2021	Sep. 30, 2020
Change in plan assets
Settlement		$ (33.6)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation		327.9	$ 602.3	$ 327.9	$ 594.2
Change in projected benefit obligation
Benefit obligation at the beginning of the period	$ 604.2		604.2	611.8	613.6
Service cost			2.6	10.3	11.5
Interest cost			4.3	17.0	16.4
Actuarial loss (gain)			5.1	(148.5)	(22.6)
Settlement				(135.4)
Benefits paid			(4.6)	(18.2)	(16.4)
Currency translation adjustments			0.2	(3.8)	1.7
Benefit obligation at the end of the period		333.2	611.8	333.2	604.2	$ 613.6
Change in plan assets
Fair value of plan assets at the beginning of the period	515.9		515.9	533.0	437.3
Actual return on plan assets			23.5	(102.2)	71.3
Company contributions			0.5	28.6	25.2
Settlement				(135.4)
Expenses paid			(2.5)	(2.9)	(2.9)
Benefits paid			(4.6)	(18.2)	(16.4)
Currency translation adjustments			0.2	(4.2)	1.4
Fair value of plan assets at the end of the period		298.7	533.0	298.7	515.9	437.3
Funded status of plan - at end of period		(34.5)	(78.8)	(34.5)	(88.3)
Recognized in consolidated balance sheet at end of period
Prepaid benefit cost (long-term asset)		6.2	2.9	6.2	2.1
Accrued benefit liability (current liability)		(2.0)	(2.0)	(2.0)	(2.0)
Accrued benefit liability (long-term liability)		(38.7)	(79.7)	(38.7)	(88.4)
Total		(34.5)	(78.8)	(34.5)	(88.3)
Postretirement Health and Other
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation		44.6	55.7	44.6	53.3
Change in projected benefit obligation
Benefit obligation at the beginning of the period	53.3		53.3	55.7	53.3
Service cost	0.5		0.5	2.2	2.2	3.5
Interest cost	0.3		0.4	1.4	1.2	1.6
Actuarial loss (gain)	2.2			(12.0)	(1.1)
Benefits paid	$ (0.6)			(2.7)	(2.3)
Benefit obligation at the end of the period		44.6	55.7	44.6	53.3	$ 53.3
Change in plan assets
Company contributions			0.7	2.7	2.3
Benefits paid			(0.7)	(2.7)	(2.3)
Funded status of plan - at end of period		(44.6)	(55.7)	(44.6)	(53.3)
Recognized in consolidated balance sheet at end of period
Accrued benefit liability (current liability)		(2.2)	(2.6)	(2.2)	(2.4)
Accrued benefit liability (long-term liability)		(42.4)	(53.1)	(42.4)	(50.9)
Total		$ (44.6)	$ (55.7)	$ (44.6)	$ (53.3)