Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details) $ in Millions	3 Months Ended
Sep. 30, 2024 USD ($) segment	Sep. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)
Intangible Assets:
Amortization expense	$ 2.6	$ 3.0
Number of reporting units \| segment	1
Future amortization of intangible assets
Fiscal 2025	$ 7.3
Fiscal 2026	8.7
Fiscal 2027	7.1
Fiscal 2028	5.3
Fiscal 2029	4.5
Thereafter	24.6
Intangible Assets
Gross Carrying Amount	130.8		$ 130.8
Accumulated Amortization	(73.1)		(70.5)
Net Carrying Value	57.7		60.3
Trade names
Intangible Assets
Gross Carrying Amount	70.6		70.6
Accumulated Amortization	(24.7)		(23.5)
Net Carrying Value	45.9		47.1
Customer and distributor relationships
Intangible Assets
Gross Carrying Amount	37.1		37.1
Accumulated Amortization	(31.8)		(31.1)
Net Carrying Value	5.3		6.0
Developed technology
Intangible Assets
Gross Carrying Amount	21.7		21.7
Accumulated Amortization	(15.5)		(14.8)
Net Carrying Value	6.2		6.9
Other
Intangible Assets
Gross Carrying Amount	1.4		1.4
Accumulated Amortization	(1.1)		(1.1)
Net Carrying Value	$ 0.3		$ 0.3

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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