CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive (Loss) Income	Accumulated Other Comprehensive (Loss) Income Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock	Non- controlling Interests
Balance, beginning of period at Dec. 31, 2017	$ 2,857.6	$ 1.2	$ 3,302.6	$ 2,713.0	$ 15.3	$ (288.2)	$ (15.3)	$ (2,953.7)	$ 82.7
Balance, beginning of period (in shares) at Dec. 31, 2017		116,303,729
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Net earnings	$ 556.7			556.7
Other comprehensive income (loss)	(96.3)					(96.3)
Issuances under equity plans	(12.1)		5.2					(17.3)
Issuances under equity plans (in shares)		492,170
Share-based compensation expense	27.8		27.8
Dividends	(127.3)			(127.3)
Repurchases of common stock	(500.7)							(500.7)
Noncontrolling interest transactions	(7.2)		1.9						(9.1)
Balance, end of period at Dec. 31, 2018	2,698.5	$ 1.2	3,337.5	3,157.7		(399.8)		(3,471.7)	73.6
Balance, end of period (in shares) at Dec. 31, 2018		116,795,899
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	465.7			465.7
Other comprehensive income (loss)	(41.2)					(41.2)
Issuances under equity plans	(0.2)		7.0					(7.2)
Issuances under equity plans (in shares)		394,984
Share-based compensation expense	26.3		26.3
Dividends	(129.3)			(129.3)
Repurchases of common stock	(203.0)							(203.0)
Noncontrolling interest transactions	(55.3)		(0.2)						(55.1)
Balance, end of period at Dec. 31, 2019	2,761.5	$ 1.2	3,370.6	3,494.1		(441.0)		(3,681.9)	18.5
Balance, end of period (in shares) at Dec. 31, 2019		117,190,883
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	23.8			23.8
Other comprehensive income (loss)	43.7					43.7
Issuances under equity plans	0.1		7.7					(7.6)
Issuances under equity plans (in shares)		365,108
Share-based compensation expense	24.2		24.2
Dividends	(129.1)			(129.1)
Repurchases of common stock	(264.7)							(264.7)
Noncontrolling interest transactions	(5.9)								(5.9)
Balance, end of period at Dec. 31, 2020	$ 2,453.6	$ 1.2	$ 3,402.5	$ 3,388.8		$ (397.3)		$ (3,954.2)	$ 12.6
Balance, end of period (in shares) at Dec. 31, 2020		117,555,991