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Goodwill and Intangible Assets - Amortization on Intangible Assets (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2021
Jun. 30, 2020
Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization of intangible assets $ 30.8 $ 50.7 $ 61.0 $ 59.3