Condensed Consolidated Statements of Changes in Equity (Unaudited) (USD $) In Millions	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Stock [Member]	Treasury Stock [Member]	Paid-in Capital [Member]	Noncontrolling Interest [Member]	Total
Beginning Balance at Dec. 31, 2010	$ 283.2	$ 29.0	$ 0.3	$ (8.9)	$ 95.0	$ 1.9	$ 400.5
Net income (loss)	12.2						12.2
Cash dividends	(5.7)						(5.7)
Issuance of treasury shares pursuant to employee stock compensation plans				2.5	0.2		2.7
Tax benefit from employee stock compensation plans					0.2		0.2
Vesting of common stock in connection with employee stock compensation plans					1.1		1.1
Purchase of noncontrolling interest					(5.2)	(0.5)	(5.7)
Sale of subsidiary shares to noncontrolling interest		(1.4)			(3.4)	4.8
Deconsolidation of variable interest entity						(1.3)	(1.3)
Other comprehensive income (loss)		(0.5)					(0.5)
Ending Balance at Mar. 31, 2011	289.7	27.1	0.3	(6.4)	87.9	4.9	403.5
Beginning Balance at Dec. 31, 2011	319.5	(14.9)	0.3	(3.4)	94.5	4.2	400.2	[1]
Net income (loss)	12.8					0.1	12.9
Cash dividends	(5.7)						(5.7)
Issuance of treasury shares pursuant to employee stock compensation plans				1.7	1.6		3.3
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				0.2	10.4
Ending Balance at Mar. 31, 2012	$ 326.6	$ (4.7)	$ 0.3	$ (1.7)	$ 97.8	$ 4.5	$ 422.8

[1] *Condensed from audited financial statements.