Consolidated Statements of Stockholders' Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Common Stock Issued [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock at Cost [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2011	$ 469.0	$ 0.9	$ 881.2	$ 692.9	$ (37.1)	$ (1,070.1)	$ 1.2
Beginning balance, Treasury shares at Dec. 31, 2011						36,100,000
Beginning balance, shares at Dec. 31, 2011		86,900,000
Stockholders' Equity [Roll Forward]
Net income	90.0			90.0
Dividends	(38.5)			(38.5)
Foreign currency translation adjustments, net	11.4				11.1
Foreign currency translation adjustments, net							0.3
Pension and postretirement liability changes, net of tax expense (benefit)	(6.5)				(6.5)
Change in fair value of available-for-sale marketable equity securities changes	1.9				1.9
Stock-based compensation expense	16.3		16.3
Change in cash flow hedges, net of tax expense (benefit)	8.3				8.3
Common stock issued	0.2		0.2
Common stock issued, shares		300,000
Treasury stock purchases	(57.3)		(2.9)			(54.4)
Treasury stock purchases, shares						800,000
Tax benefits of stock-based compensation	3.5		3.5			0
Ending Balance at Dec. 31, 2012	498.3	0.9	898.3	744.4	(22.3)	(1,124.5)	1.5
Ending balance, Treasury shares at Dec. 31, 2012						36,900,000
Ending balance, shares at Dec. 31, 2012		87,200,000
Stockholders' Equity [Roll Forward]
Net income	171.8			171.8
Dividends	(45.7)			(45.7)
Foreign currency translation adjustments, net	(72.0)				(71.8)
Foreign currency translation adjustments, net							(0.2)
Pension and postretirement liability changes, net of tax expense (benefit)	41.5				41.5
Change in fair value of available-for-sale marketable equity securities changes	(6.8)				(6.8)
Stock-based compensation expense	29.5		29.5
Change in cash flow hedges, net of tax expense (benefit)	(1.7)				(1.7)
Treasury shares reissued for common stock	1.8		(3.9)			5.7	0
Treasury shares reissued for common stock, shares						(500,000)
Treasury stock purchases	(137.0)		(17.7)			(119.3)
Treasury stock purchases, shares	1,700,000					1,700,000
Tax benefits of stock-based compensation	6.5		6.5
Ending Balance at Dec. 31, 2013	485.7	0.9	912.7	870.5	(61.1)	(1,238.1)	0.8
Ending balance, Treasury shares at Dec. 31, 2013	38,066,794					38,100,000
Ending balance, shares at Dec. 31, 2013		87,200,000
Stockholders' Equity [Roll Forward]
Net income	205.8			205.8
Dividends	(54.2)			(54.2)
Foreign currency translation adjustments, net	(45.7)				(45.7)
Foreign currency translation adjustments, net							0
Pension and postretirement liability changes, net of tax expense (benefit)	(43.4)				(43.4)
Change in fair value of available-for-sale marketable equity securities changes	0.7				0.7
Stock-based compensation expense	23.3		23.3
Change in cash flow hedges, net of tax expense (benefit)	(4.0)				(4.0)
Treasury shares reissued for common stock	1.9		(5.6)			7.5
Treasury shares reissued for common stock, shares						(800,000)
Additional investment in subsidiary	0.2						0.2
Treasury stock purchases	(572.7)		(117.3)			(455.4)
Treasury stock purchases, shares	5,200,000					5,200,000
Tax benefits of stock-based compensation	11.8		11.8			0
Ending Balance at Dec. 31, 2014	$ 9.0	$ 0.9	$ 824.9	$ 1,022.1	$ (153.5)	$ (1,686.0)	$ 0.6
Ending balance, Treasury shares at Dec. 31, 2014	42,535,126					42,500,000
Ending balance, shares at Dec. 31, 2014		87,200,000