v3.24.1.u1
OTHER COMPREHENSIVE INCOME (Tables)
 3 Months Ended
Mar. 31, 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 millionsMarch 31
2024		December 31
2023		March 31
2023
AOCI   
Cash flow hedges$(19.0)$(19.4)$(20.6)
Pension and postretirement plans(123.1)(124.4)(132.5)
Total$(142.1)$(143.8)$(153.1)
Changes in Accumulated Other Comprehensive Income, Net of Tax
Changes in AOCI, net of tax, for the three months ended March 31, 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)$(143.8)
Amounts reclassified from AOCI0.4 1.3 1.7 
Net current period OCI changes0.4 1.3 1.7 
Balances as of March 31, 2024$(19.0)$(123.1)$(142.1)
Amounts Reclassified from Accumulated Other Comprehensive Income to Earnings
Amounts reclassified from AOCI to earnings are as follows:
Three Months Ended
March 31
in millions20242023
Amortization of Cash Flow Hedge Losses
Interest expense$0.5 $0.5 
Benefit from income taxes(0.1)(0.1)
Total$0.4 $0.4 
Amortization of Pension and Postretirement Plan Actuarial Loss
and Prior Service Cost
Other nonoperating expense$1.7 $1.7 
Benefit from income taxes(0.4)(0.4)
Total$1.3 $1.3 
Total reclassifications from AOCI to earnings$1.7 $1.7