CONDENSED CONSOLIDATED STATEMENT OF EQUITY (UNAUDITED) - 6 months ended Jun. 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	60.7				60.7
Stock-based compensation	19.4	$ 0.1	19.2	0.1
Shares issued under stock plans (shares)		0.8
Shares issued under stock plans	11.4	$ 0.1	11.2	0.1
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	3.5		3.5
Dividends declared	(15.9)				(15.9)
Other comprehensive loss, net of tax	(41.0)					(41.0)
Balance at Jun. 30, 2015	$ 989.4	$ 18.0	$ 188.6	$ (4.0)	$ 947.0	$ (160.2)
Balance (in shares) at Jun. 30, 2015		72.1