CONDENSED CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Millions	Total	Common Stock	Capital In Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Common Stock Held In Treasury
Balance at Dec. 31, 2016	$ 1,259.7	$ 12.9	$ 581.5	$ 2,341.7	$ (447.8)	$ (1,228.6)
Increase (Decrease) in Shareholders' Equity
Net income	134.7			134.7
Other comprehensive income (loss)	64.2				64.2
Cash dividends declared on common stock	(83.4)			(83.4)
Stock incentive programs and related tax withholdings	(8.5)		(8.5)
Share-based compensation	13.0		13.0
Purchase of common stock	(103.8)					(103.8)
Balance at Sep. 30, 2017	1,275.9	12.9	586.0	2,393.0	(383.6)	(1,332.4)
Balance at Dec. 31, 2017	1,201.2	12.9	590.4	2,324.8	(394.5)	(1,332.4)
Increase (Decrease) in Shareholders' Equity
Net income	151.8			151.8
Other comprehensive income (loss)	(89.1)				(89.1)
Cash dividends declared on common stock	(85.5)			(85.5)
Stock incentive programs and related tax withholdings	(5.7)		(5.7)
Share-based compensation	14.6		14.6
Balance at Sep. 30, 2018	$ 1,187.3	$ 12.9	$ 599.3	$ 2,391.1	$ (483.6)	$ (1,332.4)