OTHER COMPREHENSIVE INCOME (Tables)

12 Months Ended

Dec. 31, 2022

OTHER COMPREHENSIVE INCOME [Abstract]

Accumulated Other Comprehensive Income, Net of Tax

in millions	2022	2021	2020
AOCI
Cash flow hedges	$          (21.0)	$         (22.5)	$         (24.0)
Pension and postretirement plans	(133.7)	(130.2)	(157.3)
Total	$        (154.7)	$       (152.7)	$       (181.3)

Changes in Accumulated Other Comprehensive Income, Net of Tax

		Pension and
	Cash Flow	Postretirement
in millions	Hedges	Benefit Plans	Total
AOCI
Balances at December 31, 2019	$          (11.0)	$       (186.7)	$       (197.7)
Other comprehensive income (loss)
before reclassifications	(14.7)	6.4	(8.3)
Amounts reclassified from AOCI	1.7	23.0	24.7
Net OCI changes	(13.0)	29.4	16.4
Balances at December 31, 2020	$          (24.0)	$       (157.3)	$       (181.3)
Other comprehensive income (loss)
before reclassifications	0.0	13.4	13.4
Amounts reclassified from AOCI	1.5	13.7	15.2
Net OCI changes	1.5	27.1	28.6
Balances at December 31, 2021	$          (22.5)	$       (130.2)	$       (152.7)
Other comprehensive income (loss)
before reclassifications	0.0	(6.5)	(6.5)
Amounts reclassified from AOCI	1.5	3.0	4.5
Net OCI changes	1.5	(3.5)	(2.0)
Balances at December 31, 2022	$          (21.0)	$       (133.7)	$       (154.7)

Amounts Reclassified from Accumulated Other Comprehensive Income to Earnings

in millions	2022	2021	2020
Amortization of Cash Flow Hedge Losses
Interest expense	$             2.0	$            2.0	$            2.3
Benefit from income taxes	(0.5)	(0.5)	(0.6)
Total	$             1.5	$            1.5	$            1.7
Amortization of Pension and Postretirement Plan
Actuarial Loss and Prior Service Cost
Other nonoperating expense	$             4.0	$          18.5	$          31.2
Benefit from income taxes	(1.0)	(4.8)	(8.2)
Total	$             3.0	$          13.7	$          23.0
Total reclassifications from AOCI to earnings	$             4.5	$          15.2	$          24.7