Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	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, shares at Dec. 31, 2012		87,200,000
Beginning balance at Dec. 31, 2012	$ 498.3	$ 0.9	$ 898.3	$ 744.4	$ (22.3)	$ (1,124.5)	$ 1.5
Beginning balance, Treasury shares at Dec. 31, 2012						36,900,000
Stockholders' Equity [Roll Forward]
Net income	171.8			171.8
Dividends	(45.7)			(45.7)
Foreign currency translation adjustments, net	(72.0)				(71.8)		(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	(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
Treasury shares reissued for common stock, shares						(500,000)
Additional investment in subsidiary	(0.5)						(0.5)
Treasury stock purchases	(137.0)		(17.7)			$ (119.3)
Treasury stock purchases, shares						1,700,000
Tax benefits of stock-based compensation	6.5		6.5			$ 0.0
Ending balance, shares at Dec. 31, 2013		87,200,000
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						38,100,000
Stockholders' Equity [Roll Forward]
Net income	205.8			205.8
Dividends	(54.2)			(54.2)
Foreign currency translation adjustments, net	(45.7)				(45.7)
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	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
Ending balance, shares at Dec. 31, 2014		87,200,000
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
Stockholders' Equity [Roll Forward]
Net income	$ 186.6			186.6
Dividends	(62.0)			(62.0)
Foreign currency translation adjustments, net	(58.7)				(58.7)
Pension and postretirement liability changes, net of tax expense (benefit)	10.1				10.1
Change in fair value of available-for-sale marketable equity securities	1.2				1.2
Stock-based compensation expense	26.6		26.6
Change in cash flow hedges, net of tax expense (benefit)	(3.8)				(3.8)
Treasury shares reissued for common stock	2.4		(6.5)			$ 8.9
Treasury shares reissued for common stock, shares						(800,000)
Additional investment in subsidiary	(0.2)						(0.2)
Treasury stock purchases	$ (32.0)		135.0			$ (167.0)
Treasury stock purchases, shares	500,000					800,000
Tax benefits of stock-based compensation	$ 22.4		22.4			$ 0.0
Ending balance, shares at Dec. 31, 2015		87,200,000
Ending balance at Dec. 31, 2015	$ 101.6	$ 0.9	$ 1,002.4	$ 1,146.7	$ (204.7)	$ (1,844.1)	$ 0.4
Ending balance, Treasury shares at Dec. 31, 2015	42,491,910					42,500,000