XML 77 R66.htm IDEA: XBRL DOCUMENT v3.8.0.1
Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Apr. 16, 2018
Mar. 31, 2018
Mar. 31, 2017
Subsequent Event [Line Items]      
Cash dividends declared (in dollars per share)   $ 0.55 $ 0.50
Subsequent Event      
Subsequent Event [Line Items]      
Cash dividends declared (in dollars per share) $ 0.55    
Cash dividends declared $ 9.3