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Dividends (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Sep. 04, 2020
Aug. 04, 2020
Jun. 04, 2020
Jun. 30, 2020
Jun. 30, 2019
Dividends Payable [Line Items]          
Cash dividend paid (in dollars per share)     $ 0.3675    
Dividends declared per common share (in dollars per share)       $ 0.3675 $ 0.3655
Cash dividend     $ 90.4 $ 90.4 $ 87.1
Subsequent Event          
Dividends Payable [Line Items]          
Dividends declared per common share (in dollars per share)   $ 0.3680      
Forecast          
Dividends Payable [Line Items]          
Cash dividend $ 93.0