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Stock-Based Compensation - Intrinsic Value of Options Exercised (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Share-based Payment Arrangement [Abstract] |  |  |  |
Total intrinsic value of options exercised | $ 0.5 | $ 29.2 | $ 8.8 | $ 0.4

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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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