Related Party Transactions (Details) - Future of School - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021	Jun. 30, 2019
Related Party Transactions
Contributions made to related party	$ 0.2	$ 0.3	$ 0.8	$ 1.0
Accrued contributions to related party	$ 2.7		$ 2.7		$ 3.5	$ 2.5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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