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Goodwill and Other Intangible Assets - Components of Intangible Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Jun. 30, 2019
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 2,494.7 $ 2,625.6
Accumulated Amortization and Impairment (457.2) (318.8)
Net Carrying Amount 2,037.5 2,306.8
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1,955.8 2,053.7
Accumulated Amortization and Impairment (231.3) (144.0)
Net Carrying Amount 1,724.5 1,909.7
Computer software    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 214.4 221.3
Accumulated Amortization and Impairment (128.0) (127.0)
Net Carrying Amount 86.4 94.3
Other    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 324.5 350.6
Accumulated Amortization and Impairment (97.9) (47.8)
Net Carrying Amount 226.6 302.8
Intellectual Property    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 15.1 $ 14.2