Fair Value Measurements - Schedule of carrying amounts and estimated fair values of financial instruments not recorded at fair value in the financial statements (Details) - Level 2 - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022
Carrying Value
Carrying amounts and estimated fair values of financial instruments not recorded at fair value
Long-term debt	$ 692.1	$ 691.8
Company-owned life insurance	21.9	22.9
Fair Value
Carrying amounts and estimated fair values of financial instruments not recorded at fair value
Long-term debt	660.0	641.5
Company-owned life insurance	$ 21.9	$ 22.9