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Consolidated Statement of Change in Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Shares Held in Trust [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	$ (0.1)
Balances (in shares) at Dec. 31, 2016		45,213,832
Balances at Dec. 31, 2016	2,888.5	$ 0.5	$ 1,013.3	$ 2,407.0	$ (6.0)	$ (551.3)	$ 25.0
Increase (decrease) in shareholders' equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	279.6			276.4			3.2
Shares issued under stock compensation programs (in shares)		216,831
Shares issued under stock compensation programs	3.6	$ 0.0	3.6
Shares repurchased for payment of taxes on stock awards (in shares)		(56,846)
Shares repurchased for payment of taxes on stock awards	(6.6)	$ 0.0	(6.6)
Amortization of stock compensation	24.9		24.9
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0.0		1.3	(1.3)
Shares held in trust	0.1				0.1
Dividends paid	(33.1)			(33.1)
Change in pension liabilities, net of tax	8.2					8.2
Foreign currency translation adjustments	202.0					202.0
Increase (Decrease) in amount attributable to noncontrolling interest	9.9						9.9
Noncontrolling Interest, Change in Redemption Value	1.1		1.1
Balances (in shares) at Dec. 31, 2017		45,373,817
Balances at Dec. 31, 2017	3,378.2	$ 0.5	1,037.6	2,649.0	(5.9)	(341.1)	38.1
Increase (decrease) in shareholders' equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	491.7			484.5			7.2
Shares issued under stock compensation programs (in shares)		308,843
Shares issued under stock compensation programs	2.9	$ 0.0	2.9
Shares repurchased for payment of taxes on stock awards (in shares)		(83,242)
Shares repurchased for payment of taxes on stock awards	(12.4)	$ 0.0	(12.4)
Amortization of stock compensation	26.8		26.8
Shares held in trust	0.1				0.1
Dividends paid	(37.8)			(37.8)
Change in pension liabilities, net of tax	3.1					3.1
Foreign currency translation adjustments	(118.2)					(118.2)
Increase (Decrease) in amount attributable to noncontrolling interest	(2.3)						(2.3)
Noncontrolling Interest, Change in Redemption Value	2.4		2.4
Balances (in shares) at Dec. 31, 2018		45,599,418
Balances at Dec. 31, 2018	3,734.5	$ 0.5	1,057.3	3,095.7	(5.8)	(456.2)	43.0
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	0.2
Increase (decrease) in shareholders' equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	537.7			535.3			2.4
Shares issued under stock compensation programs (in shares)		301,670
Shares issued under stock compensation programs	3.7	$ 0.0	3.7
Stock Issued During Period, Shares, Acquisitions		5,733,603
Stock Issued During Period, Value, Acquisitions	841.2		841.2
Shares repurchased for payment of taxes on stock awards (in shares)		85,037
Shares repurchased for payment of taxes on stock awards	(13.6)	$ 0.0	13.6
Amortization of stock compensation	74.2		74.2
Shares held in trust	0.1				0.1
Dividends paid	(42.7)			(42.7)
Change in pension liabilities, net of tax	(14.6)					(14.6)
Foreign currency translation adjustments	43.0					43.0
Increase (Decrease) in amount attributable to noncontrolling interest	41.2						41.2
Balances (in shares) at Dec. 31, 2019		51,549,654
Balances at Dec. 31, 2019	$ 5,204.7	$ 0.5	$ 1,962.8	$ 3,588.3	$ (5.7)	$ (427.8)	$ 86.6

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