INCENTIVE PLANS (Tables)	12 Months Ended
Dec. 31, 2021
Aggregate Values for Distributed Restricted Share Awards	in millions2021 2020 2019 Aggregate value of distributed restricted shares$ 9.0 $ 12.2 $ 2.4
Weighted-Average Fair Value and Weighted-Average Assumptions Used in Estimating Fair Value of Grants	2021 2020 2019 SOSARs Fair value$ 52.19 $ 40.91 $ 38.90 Risk-free interest rate1.18% 1.50% 2.62% Dividend yield0.62% 0.71% 0.87% Volatility27.33% 25.74% 27.23% Expected term (years)9.00 9.00 9.00
Aggregate Intrinsic Values of Options Exercised	in millions2021 2020 2019 Aggregate intrinsic value of SOSARs exercised$ 24.9 $ 22.3 $ 74.8
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, 2021 243,859 $ 121.53 Granted 112,070 164.38 Vested (125,551) 110.41 Canceled/forfeited (9,390) 136.81 Nonvested at December 31, 2021 220,988 $ 148.93
Aggregate Value of Performance Shares	in millions2021 2020 2019 Aggregate value of distributed performance shares$ 19.6 $ 38.8 $ 33.2
Restricted Shares [Member]
Summary of Restricted Stock Units	Weighted-average Number Grant Date of Shares Fair Value Restricted Stock Units Nonvested at January 1, 2021 200,153 $ 121.11 Granted 68,980 164.38 Vested (57,230) 120.70 Canceled/forfeited (6,623) 136.70 Nonvested at December 31, 2021 205,280 $ 135.26
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, 2021 788,436 $ 90.72 Granted 68,700 164.38 Exercised (229,809) 71.99 Forfeited or expired (3,183) 147.41 Outstanding at December 31, 2021 624,144 $ 105.43 5.17 $ 63.2 Exercisable at December 31, 2021 484,140 $ 94.00 4.22 $ 54.5
Cash and Stock Consideration Received and Tax Benefit Realized from SOSAR Exercises and Compensation Cost Recorded	in millions2021 2020 2019 SOSARs Cash and stock consideration received from exercises$ 0.0 $ 0.0 $ 0.0 Tax benefit from exercises 6.3 5.7 29.0 Compensation cost 3.9 3.9 4.0

Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of the amount of cash proceeds received from the exercise of stock options and similar instruments granted under share-based payment arrangements and the tax benefit realized from stock options exercised during the period. Disclosure may also include the intrinsic value of stock options exercised during the period.

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The aggregate values of distributed performance shares.

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