CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Millions	Total	Common Stock	Capital In Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Common Stock Held In Treasury
Balance at Dec. 31, 2015	$ 1,207.4	$ 12.8	$ 573.2	$ 2,216.0	$ (509.9)	$ (1,084.7)
Increase (Decrease) in Shareholders' Equity
Net income	236.2			236.2
Other comprehensive income (loss)	62.1				62.1
Cash dividends declared on common stock	(110.5)			(110.5)
Stock incentive programs and related tax withholdings	(14.2)	0.1	(14.3)
Excess tax benefit from share-based payment arrangements	4.5		4.5
Share-based compensation	18.1		18.1
Purchase of common stock	(143.9)					(143.9)
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	94.0			94.0
Other comprehensive income (loss)	53.3				53.3
Cash dividends declared on common stock	(110.9)			(110.9)
Stock incentive programs and related tax withholdings	(8.5)		(8.5)
Share-based compensation	17.4		17.4
Purchase of common stock	(103.8)					(103.8)
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	225.7			225.7
Other comprehensive income (loss)	(110.8)				(110.8)
Cash dividends declared on common stock	(114.0)			(114.0)
Stock incentive programs and related tax withholdings	(5.8)		(5.8)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	20.2			20.2	20.2
Share-based compensation	19.6		19.6
Balance at Dec. 31, 2018	$ 1,215.9	$ 12.9	$ 604.2	$ 2,456.7	$ (525.5)	$ (1,332.4)