STATEMENT OF CHANGES IN EQUITY AND ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Statement of Changes in Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,648.6	$ 1,425.1
Net earnings	90.4	87.5
Dividends declared	(56.1)	(53.4)
Treasury stock purchased	(21.6)	(8.9)
Treasury stock issued	5.7	3.3
Foreign currency translation adjustments	(8.8)	(14.3)
Cash flow hedges, net of tax	1.0	1.1
Defined benefit pension plans, net of tax	0.9	0.8
Stock-based compensation transactions, net of tax	11.3	15.0
Ending balance	1,671.4	1,456.2
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	2,973.0	2,797.2
Net earnings	90.4	87.5
Dividends declared	(57.4)	(54.8)
Ending balance	3,006.0	2,829.9
Common Stock & Additional Contributed Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	559.9	545.2
Dividends declared	1.3	1.4
Treasury stock issued	(14.1)	(19.6)
Stock-based compensation transactions, net of tax	11.3	15.0
Ending balance	558.4	542.0
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,846.6)	(1,865.4)
Treasury stock purchased	(21.6)	(8.9)
Treasury stock issued	19.8	22.9
Ending balance	(1,848.4)	(1,851.4)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0.6	0.5
Net earnings		0.0
Ending balance	0.6	0.5
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(38.3)	(52.4)
Foreign currency translation adjustments	(8.8)	(14.3)
Cash flow hedges, net of tax	1.0	1.1
Defined benefit pension plans, net of tax	0.9	0.8
Ending balance	$ (45.2)	$ (64.8)