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Employee Deferred Savings Plan - Contributions to Plan (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Retirement Benefits [Abstract]
Deferred savings plan contributions	$ 4.0	$ 7.1	$ 8.3	$ 7.2

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- References

No definition available.

+ Details

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

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