CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) (USD $) In Millions	Total	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Stock [Member]	Treasury Stock [Member]	Paid-in Capital [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2011	$ 394.9	$ 314.3	$ (14.7)	$ 0.3	$ (3.4)	$ 94.3	$ 4.1
Net income (loss)	13.5	13.4					0.1
Cash dividends	(5.8)	(5.8)
Issuance of treasury shares pursuant to employee stock compensation plans	3.3				1.7	1.6
Tax benefit from employee stock compensation plans	(0.1)					(0.1)
Vesting of common stock in connection with employee stock compensation plans	1.8					1.8
Other comprehensive income (loss)	10.2		10.0				0.2
Balance at Mar. 31, 2012	417.8	321.9	(4.7)	0.3	(1.7)	97.6	4.4
Balance at Dec. 31, 2012	465.1	355.2	0.8	0.3	0	105.1	3.7
Net income (loss)	10.4	10.5					(0.1)
Cash dividends	(6.5)	(6.5)
Issuance of treasury shares pursuant to employee stock compensation plans	3.8				(0.7)	4.5
Tax benefit from employee stock compensation plans	(0.3)					(0.3)
Vesting of common stock in connection with employee stock compensation plans	1.8					1.8
Other comprehensive income (loss)	(13.8)		(13.6)				(0.2)
Contribution from noncontrolling partner	0.1					0.1
Balance at Mar. 31, 2013	$ 460.6	$ 359.2	$ (12.8)	$ 0.3	$ (0.7)	$ 111.2	$ 3.4