INCENTIVE PLANS (Tables)

12 Months Ended

Dec. 31, 2023

Aggregate Values for Distributed Restricted Share Awards

in millions	2023	2022	2021
Aggregate value of distributed
restricted shares	$          11.1	$          15.7	$            9.0

Weighted-Average Fair Value and Weighted-Average Assumptions Used in Estimating Fair Value of Grants

	2023	2022	2021
SOSARs
Fair value	$        72.39	$        60.57	$        52.19
Risk-free interest rate	3.90%	2.02%	1.18%
Dividend yield	0.79%	0.77%	0.62%
Volatility	28.88%	26.68%	27.33%
Expected term (years)	9.0	9.0	9.0

Aggregate Intrinsic Values of Options Exercised

in millions	2023	2022	2021
Aggregate intrinsic value of SOSARs exercised	$          25.1	$            1.9	$          24.9

Performance Shares [Member]

Summary of Activity For Nonvested Performance Share Units

	Target	Weighted-average
	Number	Grant Date
	of Shares	Fair Value
Performance Shares
Nonvested at January 1, 2023	219,901	$           160.48
Granted	126,010	175.46
Vested	(105,606)	164.41
Canceled/forfeited	(12,833)	179.09
Nonvested at December 31, 2023	227,472	$           180.13

Aggregate Value of Performance Shares

in millions	2023	2022	2021
Aggregate value of distributed
performance shares	$          24.8	$          33.4	$          19.6

Restricted Shares [Member]

Summary of Restricted Stock Units

		Weighted-average
	Number	Grant Date
	of Shares	Fair Value
Restricted Stock Units
Nonvested at January 1, 2023	185,488	$           162.40
Granted	133,902	175.46
Vested	(63,722)	137.56
Canceled/forfeited	(18,995)	177.28
Nonvested at December 31, 2023	236,673	$           175.29

SOSARs [Member]

Summary of Our SOSAR Activity

			Weighted-average
			Remaining	Aggregate
	Number	Weighted-average	Contractual	Intrinsic Value
	of Shares	Exercise Price	Life (Years)	(in millions)
SOSARs
Outstanding at January 1, 2023	674,369	$           114.46
Granted	61,960	180.52
Exercised	(197,756)	79.83
Forfeited or expired	(5,116)	179.47
Outstanding at December 31, 2023	533,457	$           134.35	5.27	$               49.0
Exercisable at December 31, 2023	408,300	$           120.53	4.30	$               43.2

Cash Consideration Received and Tax Benefit Realized from SOSAR Exercises and Compensation Cost Recorded

in millions	2023	2022	2021
SOSARs
Cash received from exercises	$            0.0	$            0.0	$            0.0
Tax benefit from exercises	6.0	0.4	6.3
Compensation cost	4.0	4.0	3.9