CONDENSED CONSOLIDATED STATEMENT OF EQUITY (USD $) In Millions, unless otherwise specified	Total	Common Stock	Capital In Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Common Stock Held In Treasury
Balance at Dec. 31, 2011	$ 1,582.1	$ 12.7	$ 532.4	$ 1,832.9	$ (90.7)	$ (705.2)
Increase (Decrease) in Shareholders' Equity
Net income	133.7			133.7
Other comprehensive income (loss)	(27.2)				(27.2)
Cash dividends declared on common stock	(79.3)			(79.3)
Stock incentive programs and related tax withholdings	(5.1)		(5.1)
Excess tax benefit (expense) from share-based payment arrangements	0.3		0.3
Share-based compensation	13.1		13.1
Balance at Sep. 30, 2012	1,617.6	12.7	540.7	1,887.3	(117.9)	(705.2)
Balance at Dec. 31, 2012	1,640.9	12.7	545.4	1,900.9	(112.9)	(705.2)
Increase (Decrease) in Shareholders' Equity
Net income	156.4			156.4
Other comprehensive income (loss)	6.1				6.1
Cash dividends declared on common stock	(81.4)			(81.4)
Stock incentive programs and related tax withholdings	(13.5)	0.1	(13.6)
Excess tax benefit (expense) from share-based payment arrangements	(0.6)		(0.6)
Share-based compensation	15.1		15.1
Purchase of common stock	(35.6)					(35.6)
Balance at Sep. 30, 2013	$ 1,687.4	$ 12.8	$ 546.3	$ 1,975.9	$ (106.8)	$ (740.8)