Retirement Plans - Additional Information (Details) $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2019 USD ($) Letter	Sep. 30, 2019 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2021 USD ($)	Apr. 30, 2020 USD ($)	Feb. 29, 2020 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer Plans, Withdrawal Obligation			$ 219.6		$ 219.6			$ 247.1
Pace Industry Union Management Pension Fund [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Withdrawal obligation, per month		$ 0.7					$ 0.7
Periods of Payments Used to Calculate Withdrawal Liability in Connection with PIUMPF Withdrawal		20 years					20 years
Withdrawal obligation accumulated funding deficiency										$ 51.2
Multiemployer Plans, Withdrawal Obligation		$ 170.3					$ 170.3
Pace Industry Union Management Pension Fund [Member] | Subsidiary [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Periods of Payments Used to Calculate Withdrawal Liability in Connection with PIUMPF Withdrawal	20 years
Withdrawal obligation accumulated funding deficiency	$ 2.0								$ 1.3
Multiemployer Plans, Withdrawal Obligation	$ 2.3
Number of additional demand letters | Letter	2
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions by employer to pension and supplemental retirement plans			4.8	$ 4.8	15.1	$ 15.6
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions by employer to pension and supplemental retirement plans			$ 2.0	$ 1.6	$ 5.1	$ 4.7