Consolidated Statements of Shareholders' Equity (USD $) In Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2009	$ 1,206.4	$ 1,084.1	$ (1,042.0)	$ 1,221.3	$ (57.0)
Balance (shares) at Dec. 31, 2009		183.3
Issuance of common shares (shares)		0.9
Issuance of common shares	0
Treasury shares issued for share-based plans, net	3.7		6.7	(3.0)
Tax related to share-based arrangements, net of excess tax benefits	(4.9)	(4.9)
Repurchase of Common Shares	(24.9)		(24.9)
Net Income (Loss)	(53.2)			(53.2)
Other comprehensive income	41.7				41.7
Amortization of stock-based compensation	15.3	15.3
Balance at Dec. 31, 2010	1,184.1	1,094.5	(1,060.2)	1,165.1	(15.3)
Balance (shares) at Dec. 31, 2010		184.2
Issuance of common shares (shares)		0.8
Issuance of common shares	0
Treasury shares issued for share-based plans, net	3.5		7.9	(4.4)
Tax related to share-based arrangements, net of excess tax benefits	(1.9)	(1.9)
Stock option exercises	3.0	3.0
Repurchase of Common Shares	(96.8)		(96.8)
Net Income (Loss)	334.8			334.8
Other comprehensive income	(31.4)				(31.4)
Amortization of stock-based compensation	16.2	16.2
Balance at Dec. 31, 2011	1,411.5	1,111.8	(1,149.1)	1,495.5	(46.7)
Balance (shares) at Dec. 31, 2011		185.0
Issuance of common shares (shares)		2.5
Issuance of common shares
Treasury shares issued for share-based plans, net	3.3		4.3	(1.0)
Tax related to share-based arrangements, net of excess tax benefits	(14.6)	(14.6)
Stock option exercises	10.9	10.9
Repurchase of Common Shares	(184.4)		(184.4)
Net Income (Loss)	100.6			100.6
Other comprehensive income	36.2				36.2
Cash dividends declared				(16.5)
Amortization of stock-based compensation	24.9	24.9
Balance at Dec. 31, 2012	$ 1,371.9	$ 1,133.0	$ (1,329.2)	$ 1,578.6	$ (10.5)
Balance (shares) at Dec. 31, 2012		187.5