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	Mar. 31, 2023	Jun. 30, 2022
Carrying Value
Carrying amounts and estimated fair values of financial instruments not recorded at fair value
Long-term debt	$ 692.7	$ 691.8
Company-owned life insurance	24.7	22.9
Fair Value
Carrying amounts and estimated fair values of financial instruments not recorded at fair value
Long-term debt	705.2	641.5
Company-owned life insurance	$ 24.7	$ 22.9