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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Oct. 15, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Subsequent Event [Line Items]            
Cash dividends declared (in dollars per share)   $ 0.60 $ 0.60 $ 0.55 $ 0.55 $ 0.55
Subsequent Event            
Subsequent Event [Line Items]            
Cash dividends declared (in dollars per share) $ 0.60          
Cash dividends declared $ 9.6