Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	Mar. 31, 2021	Jun. 30, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to retained earnings	$ 469.6	$ 197.6
Increase in deferred taxes	$ 468.6	463.8
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in allowance for credit loss		2.8
Increase to retained earnings		2.1
Increase in deferred taxes		$ 0.7

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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