XML 139 R122.htm IDEA: XBRL DOCUMENT v3.20.4
Subsequent Event (Details) - $ / shares
12 Months Ended
Feb. 23, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Subsequent Event [Line Items]        
Dividends declared (in dollars per share)   $ 0.34 $ 0.69 $ 11.65
Subsequent Event        
Subsequent Event [Line Items]        
Dividends declared (in dollars per share) $ 0.15