XML 20 R4.htm IDEA: XBRL DOCUMENT v3.24.0.1
Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Net income $ 276.0 $ 270.8 $ 251.2
Other comprehensive income (loss), net of tax:      
Benefit plan liability adjustments - net gain (loss) (net of tax of $0, $(1.5), and $(0.7), respectively) (0.3) 4.6 2.0
Reclassification adjustment of benefit plan liability - net loss (net of tax of $0, $(0.2), and $(0.7), respectively) 0.2 0.5 1.7
Reclassification adjustment of benefit plan liability - prior service cost (net of tax of $0, $0, and $0, respectively)   (0.1) (0.1)
Net unrealized gains (losses) on commodity derivatives (net of tax of $1.1, $0.2, and $(1.0), respectively) (3.6) (0.6) 3.0
Other comprehensive income (loss), net of tax 0.8 4.5 7.3
Comprehensive income 276.8 275.3 258.5
Less: comprehensive income attributable to non-controlling interest (13.8) (12.4) (14.5)
Comprehensive income available for common stock 263.0 262.9 244.0
Interest rate swaps      
Other comprehensive income (loss), net of tax:      
Other comprehensive income (loss), cash flow hedge, gain (loss), reclassification, after tax 2.2 2.1 2.2
Commodity derivatives      
Other comprehensive income (loss), net of tax:      
Other comprehensive income (loss), cash flow hedge, gain (loss), reclassification, after tax $ 2.3 $ (2.0) $ (1.5)