Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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INCENTIVE PLANS (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of authorized shares remaining	5,935,934
Officers And Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expense provision under cash-based compensation plans	$ 42.2	$ 42.1	$ 40.8
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	$ 18.2	$ 17.8	$ 18.2
Weighted-average Grant Date Fair Value, Granted	$ 164.38	$ 133.95	$ 110.39
Share-based compensation plans vesting period (in years)	3 years
SOSARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	$ 3.9	$ 3.9	$ 4.0
Share-based compensation plans vesting period (in years)	3 years
Share-based compensation plans expiration period (in years)	10 years
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	$ 10.4	$ 9.8	$ 7.8
Weighted-average Grant Date Fair Value, Granted	$ 164.38	$ 133.95	$ 110.39
Share-based compensation plans vesting period (in years)	3 years
Deferred Stock Units [Member] \| Share-based Payment Arrangement, Nonemployee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	$ 2.2	$ 1.6	$ 1.8
Minimum [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units paid target range	0.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares that may be issued	8,000,000
Maximum [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units paid target range	200.00%