CONDENSED CONSOLIDATED STATEMENT OF EQUITY (UNAUDITED) - 9 months ended Sep. 30, 2015 - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2014	$ 956.9	$ 17.8	$ 160.2	$ (4.1)	$ 902.2	$ (119.2)
Balance (in shares) at Dec. 31, 2014		71.4
Increase (Decrease) in Equity [Roll Forward]
Net income	62.2				62.2
Stock-based compensation	23.5	$ 0.1	23.2	0.2
Shares issued under stock plans (shares)		0.9
Shares issued under stock plans	13.8	$ 0.1	13.7
Shares repurchased for employee tax withholdings (shares)		(0.1)
Shares repurchased for employee tax withholdings	(5.6)		(5.5)	(0.1)
Excess tax benefit from employee stock plans	4.2		4.2
Dividends declared	(24.5)				(24.5)
Other comprehensive loss, net of tax	(35.2)					(35.2)
Balance at Sep. 30, 2015	$ 995.3	$ 18.0	$ 195.8	$ (4.0)	$ 939.9	$ (154.4)
Balance (in shares) at Sep. 30, 2015		72.2