Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Common Stock Including Additional Paid in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Balance (shares) at Dec. 31, 2012		187.5
Balance at Dec. 31, 2012	$ 1,371.9		$ 1,133.0	$ (1,329.2)	$ 1,578.6	$ (10.5)
Issuance of common shares (shares)		1.4
Treasury shares issued for share-based plans, net	2.7		0.1	2.6
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation	(9.4)		(9.4)
Stock option exercises	2.8		2.8
Repurchase of Common Shares	(119.0)			(119.0)
Net Income (Loss)	60.9				60.9
Other comprehensive income	(9.0)					(9.0)
Cash dividends declared	(24.7)				(24.7)
Amortization of stock-based compensation	13.4		13.4
Balance (shares) at Dec. 31, 2013		188.9
Balance at Dec. 31, 2013	1,224.1		1,074.4	(1,445.6)	1,614.8	(19.5)
Temporary Equity, Par Value	(65.5)		(65.5)
Issuance of common shares (shares)		0.9
Treasury shares issued for share-based plans, net	1.0		0.3	0.7
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation	(8.3)		(8.3)
Stock option exercises	1.5		1.5
Repurchase of Common Shares	(46.3)			(46.3)
Net Income (Loss)	120.0				120.0
Other comprehensive income	(47.2)					(47.2)
Cash dividends declared	(27.2)				(27.2)
Amortization of stock-based compensation	8.4		8.4
Temporary Equity, Accretion of Dividends	1.2		1.2
Balance (shares) at Dec. 31, 2014		189.8
Balance at Dec. 31, 2014	1,227.2		1,077.5	(1,491.2)	1,707.6	(66.7)
Temporary Equity, Par Value	(64.3)
Issuance of common shares (shares)		0.6
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation	(2.4)		(2.4)
Stock option exercises	3.3		3.3
Repurchase of Common Shares	(72.5)			(72.5)
Net Income (Loss)	169.0				169.0
Other comprehensive income	(35.1)					(35.1)
Cash dividends declared	(30.4)				(30.4)
Amortization of stock-based compensation	15.7		15.7
Temporary Equity, Accretion of Dividends	1.4		1.4
Balance (shares) at Dec. 31, 2015		190.4
Balance at Dec. 31, 2015	1,276.2		$ 1,095.5	$ (1,563.7)	$ 1,846.2	$ (101.8)
Temporary Equity, Par Value	$ (62.9)