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CONSOLIDATED CONDENSED STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) (Parentheticals) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Net change in postretirement benefit plans, Tax Benefits $ 0.2 $ 0.4 $ 0.4 $ 0.8
Amortization of prior service costs, Tax (Expense) Benefit (0.2) (0.3) (0.5) (0.5)
Amortization of net actuarial loss, Tax Benefits $ 0.4 $ 0.7 $ 0.9 $ 1.3