XML 16 R6.htm IDEA: XBRL DOCUMENT v3.19.2
Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Statement of Comprehensive Income [Abstract]        
Pension and postretirement income, associated tax $ 0 $ 0 $ 0 $ 0