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OTHER COMPREHENSIVE INCOME (Tables)
6 Months Ended
Jun. 30, 2024
Stockholders' Equity Note [Abstract]  
Accumulated Other Comprehensive Income, Net of Tax
Amounts in accumulated other comprehensive income (loss) (AOCI), net of tax, are as follows:
in millionsJune 30
2024
December 31
2023
June 30
2023
AOCI   
Cash flow hedges$(18.6)$(19.4)$(20.2)
Pension and postretirement plans(122.0)(124.4)(131.2)
Total$(140.6)$(143.8)$(151.4)
Changes in Accumulated Other Comprehensive Income, Net of Tax
Changes in AOCI, net of tax, for the six months ended June 30, 2024 are as follows:
in millionsCash Flow
Hedges
Pension and
Postretirement
Benefit Plans
Total
AOCI
Balances as of December 31, 2023$(19.4)$(124.4)$(143.8)
Amounts reclassified from AOCI0.8 2.4 3.2 
Balances as of June 30, 2024$(18.6)$(122.0)$(140.6)
Amounts Reclassified from Accumulated Other Comprehensive Income to Earnings
Amounts reclassified from AOCI to earnings are as follows:
Three Months Ended
June 30
Six Months Ended
June 30
in millions2024202320242023
Amortization of Cash Flow Hedge Losses
Interest expense$0.6 $0.5 $1.1 $1.1 
Benefit from income taxes(0.2)(0.1)(0.3)(0.3)
Total$0.4 $0.4 $0.8 $0.8 
Amortization of Pension and Postretirement Plan Actuarial Loss and Prior Service Cost
Other nonoperating expense$1.7 $1.8 $3.3 $3.4 
Benefit from income taxes(0.5)(0.5)(0.9)(0.9)
Total$1.2 $1.3 $2.4 $2.5 
Total reclassifications from AOCI to earnings$1.6 $1.7 $3.2 $3.3