CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Millions, except Share data	Total USD ($)	Common Stock [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Other Comprehensive Income [Member] USD ($)	Treasury Stock [Member] USD ($)	Noncontrolling Interest [Member] USD ($)	Redeemable Noncontrolling Interest [Member] USD ($)	Number of common shares outstanding [Member]
Balance at Dec. 31, 2009	$ 1,092.5	$ 1.6	$ 1,360.3	$ 1,564.4	$ (7.6)	$ (1,826.3)	$ 0.1	$ 0
Balance (in shares) at Dec. 31, 2009									85,400,000
Comprehensive income (loss)	53.6			53.8	(0.8)		0.6
Issuance of restricted stock to employees, net of forfeitures (in shares)									1,700,000
Amortization expense in connection with employee stock options and restricted stock	22.0		22.0
Exercise of employee stock options	0.6		0.6
Distributions to noncontrolling interests	(0.6)						(0.6)
Tax effects from vesting of restricted stock and exercise of employee stock options	(0.6)		(0.6)
Tax effects of expired employee stock options	(1.1)		(1.1)
Dividends on common stock ($0.20 per share)	(17.4)			(17.4)
Repurchase of common shares (in shares)									(700,000)
Repurchase of common shares	(10.7)					(10.7)
Retirement of treasury stock		(0.7)	(839.3)	(997.0)		1,837.0
Balance at Dec. 31, 2010	1,138.3	0.9	541.9	603.8	(8.4)	0	0.1	0
Balance (in shares) at Dec. 31, 2010									86,400,000
Comprehensive income (loss)	30.3			50.7	(21.2)		0.8
Issuance of restricted stock to employees, net of forfeitures (in shares)									1,800,000
Amortization expense in connection with employee stock options and restricted stock	16.7		16.7
Distributions to noncontrolling interests	(0.7)						(0.7)
Tax effects from vesting of restricted stock and exercise of employee stock options	1.1		1.1
Tax effects of expired employee stock options	(1.4)		(1.4)
Dividends on common stock ($0.20 per share)	(17.0)			(17.0)
Repurchase of common shares (in shares)									(7,200,000)
Repurchase of common shares	(78.0)	(0.1)	(36.5)	(41.4)
Other	0.1			0.1
Balance at Dec. 31, 2011	1,089.4	0.8	521.8	596.2	(29.6)	0	0.2	0
Balance (in shares) at Dec. 31, 2011									81,000,000
Comprehensive income (loss)	(43.3)			(56.1)	11.7		1.1
Issuance of restricted stock to employees, net of forfeitures (in shares)									2,400,000
Acquisition of Brian Atwood	0.6						0.6	0.6
Amortization expense in connection with employee stock options and restricted stock	19.7		19.7
Distributions to noncontrolling interests	(1.0)						(1.0)
Tax effects from vesting of restricted stock and exercise of employee stock options	1.7		1.7
Tax effects of expired employee stock options	(1.5)		(1.5)
Dividends on common stock ($0.20 per share)	(15.8)			(15.8)
Repurchase of common shares (in shares)									(4,200,000)
Repurchase of common shares	(44.3)		(20.9)	(23.4)
Other	0.2			0.2
Balance at Dec. 31, 2012	$ 1,005.7	$ 0.8	$ 520.8	$ 501.1	$ (17.9)	$ 0	$ 0.9	$ 0.6
Balance (in shares) at Dec. 31, 2012									79,200,000