OTHER COMPREHENSIVE INCOME (Tables)

3 Months Ended

Mar. 31, 2022

OTHER COMPREHENSIVE INCOME [Abstract]

Accumulated Other Comprehensive Income, Net of Tax

	March 31	December 31	March 31
in millions	2022	2021	2021
AOCI
Interest rate hedges	$         (22.1)	$         (22.5)	$         (23.6)
Pension and postretirement plans	(129.5)	(130.2)	(156.1)
Total	$       (151.6)	$       (152.7)	$       (179.7)

Changes in Accumulated Other Comprehensive Income, Net of Tax

		Pension and
	Interest Rate	Postretirement
in millions	Hedges	Benefit Plans	Total
AOCI
Balances as of December 31, 2021	$         (22.5)	$       (130.2)	$       (152.7)
Amounts reclassified from AOCI	0.4	0.7	1.1
Net current period OCI changes	0.4	0.7	1.1
Balances as of March 31, 2022	$         (22.1)	$       (129.5)	$       (151.6)

Amounts Reclassified from Accumulated Other Comprehensive Income to Earnings

	Three Months Ended
	March 31
in millions	2022	2021
Amortization of Interest Rate 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	$            1.0	$            1.7
Benefit from income taxes	(0.3)	(0.5)
Total	$            0.7	$            1.2
Total reclassifications from AOCI to earnings	$            1.1	$            1.6