Consolidated Statements of Shareholders' Equity - USD ($)	Total	Other Paid-In Capital	Earnings Invested in the Business	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Retained Earnings, Unappropriated [Member]	Noncontrolling Interest
Common Stock, Value, Outstanding	$ 53,100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Additional Paid in Capital, Common Stock	906,900,000
Retained Earnings (Accumulated Deficit)	1,289,300,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(77,900,000)
Treasury Stock, Value	(891,700,000)
Stockholders' Equity Attributable to Noncontrolling Interest	31,200,000
Beginning Balance at Dec. 31, 2016	(1,310,900,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation adjustments	(47,100,000)			$ (44,700,000)			$ (2,400,000)
Pension and postretirement liability adjustment (net of income tax of $6.2 million, $13.1 million and $1.1 million for 2015, 2016 and 2017, respectively)	(1,800,000)			(1,800,000)
Change in fair value of derivative financial instruments, net of reclassifications	3,300,000			3,300,000
Dividends declared to noncontrolling interest	(300,000)						(300,000)
Dividends - $1.03, $1.04 and $1.07 per share for 2015, 2016 and 2017, respectively	(83,300,000)					$ (83,300,000)
Stock-based compensation expense	24,700,000	$ 24,700,000
Payments for Repurchase of Common Stock	(43,400,000)				$ 43,400,000
Stock option exercise activity	32,900,000	10,700,000			43,600,000
Restricted share activity	0	18,600,000			(18,600,000)
Ending Balance at Dec. 31, 2017	1,474,900,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment, Tax Withholding, Share-based Payment Arrangement	(11,400,000)				(11,400,000)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	500,000	1,500,000	$ (1,000,000.0)
Net Income	202,300,000		203,400,000				(1,100,000)
Depreciation, Depletion and Amortization	137,700,000
Common Stock, Value, Outstanding	53,100,000
Additional Paid in Capital, Common Stock	903,800,000
Retained Earnings (Accumulated Deficit)	1,408,400,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(38,300,000)
Treasury Stock, Value	(884,300,000)
Stockholders' Equity Attributable to Noncontrolling Interest	32,200,000
Foreign currency translation adjustments	67,400,000			60,500,000			6,900,000
Pension and postretirement liability adjustment (net of income tax of $6.2 million, $13.1 million and $1.1 million for 2015, 2016 and 2017, respectively)	400,000			(400,000)
Change in fair value of derivative financial instruments, net of reclassifications	(3,800,000)			3,800,000
Stock Issued During Period, Value, Acquisitions	66,000,000.0	30,900,000					35,100,000
Dividends - $1.03, $1.04 and $1.07 per share for 2015, 2016 and 2017, respectively	(85,700,000)					(85,700,000)
Stock-based compensation expense	32,300,000	32,300,000
Payments for Repurchase of Common Stock	(98,500,000)				(98,500,000)
Stock option exercise activity	12,800,000	3,800,000			16,600,000
Restricted share activity	0	11,300,000			(11,300,000)
Ending Balance at Dec. 31, 2018	(1,642,700,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment, Tax Withholding, Share-based Payment Arrangement	(5,400,000)				(5,400,000)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0		700,000	(700,000)
Net Income	305,500,000		302,800,000				2,700,000
Depreciation, Depletion and Amortization	146,000,000.0
Common Stock, Value, Outstanding	53,100,000
Cumulative Effect of New Accounting Principle in Period of Adoption	4,000,000.0
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-09 [Member]			4,000,000.0
Additional Paid in Capital, Common Stock	951,900,000
Retained Earnings (Accumulated Deficit)	1,630,200,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(95,300,000)
Treasury Stock, Value	(960,300,000)
Stockholders' Equity Attributable to Noncontrolling Interest	63,100,000
Foreign currency translation adjustments	19,900,000						200,000
Pension and postretirement liability adjustment (net of income tax of $6.2 million, $13.1 million and $1.1 million for 2015, 2016 and 2017, respectively)	66,900,000			66,900,000
Change in fair value of derivative financial instruments, net of reclassifications	2,000,000.0			$ 2,000,000.0
Other Comprehensive Income (Loss), Net of Tax, Change in Noncontrolling Interest	(500,000)	(10,300,000)					9,800,000
Dividends declared to noncontrolling interest	(500,000)						(500,000)
Dividends - $1.03, $1.04 and $1.07 per share for 2015, 2016 and 2017, respectively	(84,900,000)					$ (84,900,000)
Stock-based compensation expense	27,100,000	27,100,000
Payments for Repurchase of Common Stock	(62,700,000)				(62,700,000)
Stock option exercise activity	27,500,000	7,800,000			35,300,000
Restricted share activity	0	$ 23,300,000			(23,300,000)
Ending Balance at Dec. 31, 2019	(1,954,800,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment, Tax Withholding, Share-based Payment Arrangement	(15,400,000)				$ (15,400,000)
Net Income	374,700,000		$ 362,100,000				12,600,000
Depreciation, Depletion and Amortization	160,600,000
Common Stock, Value, Outstanding	53,100,000
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	1,800,000						$ 1,800,000
Additional Paid in Capital, Common Stock	937,600,000
Retained Earnings (Accumulated Deficit)	1,907,400,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(50,100,000)
Treasury Stock, Value	(979,800,000)
Stockholders' Equity Attributable to Noncontrolling Interest	$ 86,600,000