Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) - Level 2 - USD ($) $ in Millions	Dec. 31, 2023	Jun. 30, 2023
Assets:
Derivative financial instruments	$ 0.0	$ 3.7
Liabilities:
Derivative financial instruments	$ 11.5	$ 6.8