STATEMENT OF CHANGES IN EQUITY AND ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Statement of Changes in Equity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,238.6	$ 1,195.2	$ 1,312.5	$ 1,157.6	$ 1,157.6
Net earnings (loss)	(6.1)	86.3	39.6	147.4
Dividends declared	(53.0)	(52.5)	(105.8)	(102.4)
Treasury stock purchased	(0.2)	(0.8)	(8.6)	(12.5)
Treasury stock issued	1.4	3.1	3.9	16.9
Foreign currency translation adjustments	25.8	1.0	(39.7)	9.8
Cash flow hedges, net of tax	3.7	0.7	(2.6)	4.6
Defined benefit pension plans, net of tax	0.6	0.5	1.8	1.0
Stock-based compensation transactions, net of tax	3.8	5.3	16.0	16.3
Ending balance	1,214.6	1,238.8	1,214.6	1,238.8	$ 1,312.5	$ 1,157.6
Accounting Standards Update [Extensible List]					us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Cumulative effect adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(2.5)	0.1	$ 0.1
Ending balance					(2.5)	$ 0.1
Adjusted balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			1,310.0	1,157.7	1,157.7
Ending balance					1,310.0	1,157.7
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	2,723.5	2,623.9	2,734.5	2,613.8	2,613.8
Net earnings (loss)	(6.1)	86.2	39.6	147.4
Dividends declared	(54.3)	(53.9)	(108.5)	(105.1)
Ending balance	2,663.1	2,656.2	2,663.1	2,656.2	2,734.5	2,613.8
Retained Earnings | Cumulative effect adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(2.5)	0.1	0.1
Ending balance					(2.5)	0.1
Retained Earnings | Adjusted balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			2,732.0	2,613.9	2,613.9
Ending balance					2,732.0	2,613.9
Common Stock & Additional Contributed Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	535.5	526.8	538.1	529.1	529.1
Dividends declared	1.3	1.4	2.7	2.7
Treasury stock issued	(0.8)	(1.4)	(17.0)	(16.0)
Stock-based compensation transactions, net of tax	3.8	5.3	16.0	16.3
Ending balance	539.8	532.1	539.8	532.1	538.1	529.1
Common Stock & Additional Contributed Capital | Adjusted balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			538.1	529.1	529.1
Ending balance					538.1	529.1
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,873.5)	(1,891.6)	(1,883.8)	(1,908.3)	(1,908.3)
Treasury stock purchased	(0.2)	(0.8)	(8.6)	(12.5)
Treasury stock issued	2.2	4.5	20.9	32.9
Ending balance	(1,871.5)	(1,887.9)	(1,871.5)	(1,887.9)	(1,883.8)	(1,908.3)
Treasury Stock | Adjusted balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(1,883.8)	(1,908.3)	(1,908.3)
Ending balance					(1,883.8)	(1,908.3)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0.4	0.5	0.5	0.6	0.6
Net earnings (loss)		0.1
Foreign currency translation adjustments			(0.1)
Ending balance	0.4	0.6	0.4	0.6	0.5	0.6
Noncontrolling Interest | Adjusted balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			0.5	0.6	0.6
Ending balance					0.5	0.6
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(147.3)	(64.4)	(76.8)	(77.6)	(77.6)
Foreign currency translation adjustments	25.8	1.0	(39.6)	9.8
Cash flow hedges, net of tax	3.7	0.7	(2.6)	4.6
Defined benefit pension plans, net of tax	0.6	0.5	1.8	1.0
Ending balance	$ (117.2)	$ (62.2)	(117.2)	(62.2)	(76.8)	(77.6)
Accumulated Other Comprehensive Income (Loss) | Adjusted balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ (76.8)	$ (77.6)	(77.6)
Ending balance					$ (76.8)	$ (77.6)