XML 54 R111.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Earnings Per Share (Narrative) (Details) - shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Earnings Per Share [Abstract]      
Number of anti-dilutive securities (in shares) 0 0 0