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Derivative Instruments - Narrative (Details)
$ in Millions
Mar. 31, 2020
USD ($)
derivative
Jun. 30, 2019
USD ($)
Net investment hedge    
Derivative [Line Items]    
Commercial Paper   $ 67.0
Cross currency interest rate swaps    
Derivative [Line Items]    
Derivative, Notional Amount $ 100.0  
Interest rate swaps    
Derivative [Line Items]    
Derivative, Notional Amount 831.3 841.1
Treasury locks    
Derivative [Line Items]    
Derivative, Notional Amount $ 250.0  
Number of derivative contracts | derivative 6  
Forward exchange contracts    
Derivative [Line Items]    
Derivative, Notional Amount $ 1,200.0 $ 1,000.0