FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2022

FAIR VALUE MEASUREMENTS [Abstract]

Fair Value Measurement on Recurring Basis

	Level 1 Fair Value
	March 31	December 31	March 31
in millions	2022	2021	2021
Fair Value Recurring
Rabbi Trust
Mutual funds	$          30.8	$          34.7	$          28.6
Total	$          30.8	$          34.7	$          28.6

	Level 2 Fair Value
	March 31	December 31	March 31
in millions	2022	2021	2021
Fair Value Recurring
Rabbi Trust
Money market mutual fund	$            1.1	$            0.6	$            0.3
Total	$            1.1	$            0.6	$            0.3