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QUARTERLY FINANCIAL DATA (UNAUDITED)
 12 Months Ended
Dec. 31, 2024
Quarterly Financial Data [Abstract]  
QUARTERLY FINANCIAL DATA (UNAUDITED) QUARTERLY FINANCIAL DATA (UNAUDITED)
We compute earnings per common share for each quarter independently of earnings per share for the year. The sum of the quarterly earnings per share may not equal the earnings per share for the year because of: (i) transactions affecting the weighted average number of shares outstanding in each quarter; and (ii) the uneven distribution of earnings during the year. Quarterly financial data (unaudited) were as follows (dollars in millions, except per share data):

Three months ended
2024March 31June 30September 30December 31
Revenues$1,156.5 $1,066.2 $1,129.6 $1,097.2 
Income before income taxes
$146.2 $150.6 $11.0 $210.5 
Income tax expense
33.9 34.3 1.7 44.4 
Net income
$112.3 $116.3 $9.3 $166.1 
Earnings per common share:
Basic:
Net income
$1.03 $1.08 $0.09 $1.62 
Diluted:
Net income
$1.01 $1.06 $0.09 $1.58 
2023March 31June 30September 30December 31
Revenues$1,006.0 $1,022.8 $947.5 $1,170.5 
(Loss) income before income taxes
$(1.0)$96.1 $215.6 $46.1 
Income tax (benefit) expense
(0.2)22.4 48.3 9.8 
Net (loss) income
$(0.8)$73.7 $167.3 $36.3 
Earnings per common share:
Basic:
Net (loss) income
$(0.01)$0.64 $1.48 $0.33 
Diluted:
Net (loss) income
$(0.01)$0.64 $1.46 $0.32