Leases - ROU Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Jun. 30, 2021
Operating lease assets:
Other assets	$ 42.9	$ 34.3
Operating lease liabilities:
Other accrued liabilities	9.9	9.0
Other liabilities	42.7	35.5
Total operating lease liabilities	$ 52.6	$ 44.5
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Accrued liabilities	Accrued liabilities
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Liabilities	Liabilities