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Dividends (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Feb. 03, 2022
Dec. 03, 2021
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dividends Payable [Line Items]                    
Cash dividend paid (in dollars per share)   $ 0.232                
Cash dividend   $ 128.7 $ 128.7 $ 121.2 $ 113.1 $ 96.0 $ 95.3 $ 90.4    
Dividends declared per common share (in dollars per share)     $ 0.2320     $ 0.1843     $ 0.6570 $ 0.5521
Forecast                    
Dividends Payable [Line Items]                    
Cash dividend $ 141.0                  
Subsequent Event                    
Dividends Payable [Line Items]                    
Dividends declared per common share (in dollars per share) $ 0.253