Statement of Shareholders Equity Statement - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Common Stock, Shares, Outstanding		153.4
Common Stock, Value, Outstanding		$ 153.4
Treasury Stock, Common, Shares			8.4
Treasury Stock, Value			$ (177.5)
Additional Paid in Capital, Common Stock				$ 470.6
Retained earnings					$ 1,280.1
Accumulated comprehensive loss	$ (122.1)					$ (122.1)
Total stockholders' equity	1,604.5
Net income	90.9				90.9
Dividends paid	(18.9)				(18.9)
Issuance of shares for stock plans and stock-based compensation, shares			(0.5)
Issuance of shares for stock plans and stock-based compensation, value	0.1		$ 10.0	10.1
Compensation expense associated with stock-based compensation	2.2			2.2
Taxes paid related to net settlement of stock-based awards, shares			0.3
Taxes paid related to net settlement of stock-based awards, value	(5.7)		$ (5.7)
Other comprehensive income	3.9					3.9
Effect of adoptions of ASU 2018-02 and 2014-09	(16.7)
Effect of adoptions of ASU 2018-02 and 2014-09 | Accounting Standards Update 2014-09 [Member]	(4.4)				(4.4)
Effect of adoptions of ASU 2018-02 and 2014-09 | Accounting Standards Update 2018-02 [Member]	0.0				16.7	(16.7)
Common Stock, Shares, Outstanding		153.4
Common Stock, Value, Outstanding		$ 153.4
Treasury Stock, Common, Shares			8.2
Treasury Stock, Value			$ (173.2)
Additional Paid in Capital, Common Stock				462.7
Retained earnings					1,364.4
Accumulated comprehensive loss	(134.9)					(134.9)
Total stockholders' equity	1,672.4
Common Stock, Shares, Outstanding		153.4
Common Stock, Value, Outstanding		$ 153.4
Treasury Stock, Common, Shares			16.5
Treasury Stock, Value	377.6		$ (377.6)
Additional Paid in Capital, Common Stock	458.2			458.2
Retained earnings	1,612.6				1,612.6
Accumulated comprehensive loss	(146.4)					(146.4)
Total stockholders' equity	1,700.2
Net income	26.7				26.7
Dividends paid	(16.9)				(16.9)
Issuance of shares for stock plans and stock-based compensation, shares			(0.3)
Issuance of shares for stock plans and stock-based compensation, value	0.1		$ (7.8)	7.7
Common stock, Shares acquired		(12.0)
Common stock, Value, Shares acquired		$ (12.0)
Purchase of treasury stock			1.7
Purchase of treasury stock	(438.3)		$ (38.2)
Accelerated Share Repurchase Program, Adjustment				(80.0)	(308.1)
Compensation expense associated with stock-based compensation	2.4			2.4
Taxes paid related to net settlement of stock-based awards, shares			0.1
Taxes paid related to net settlement of stock-based awards, value	(3.6)		$ (3.6)
Other comprehensive income	2.0					2.0
Common Stock, Shares, Outstanding		141.4
Common Stock, Value, Outstanding		$ 141.4
Treasury Stock, Common, Shares			18.0
Treasury Stock, Value	411.6		$ (411.6)
Additional Paid in Capital, Common Stock	372.9			$ 372.9
Retained earnings	1,314.3				$ 1,314.3
Accumulated comprehensive loss	(144.4)					$ (144.4)
Total stockholders' equity	$ 1,272.6