CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Millions	Total USD ($)	Common Stock [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Other Comprehensive Income [Member] USD ($)	Treasury Stock [Member] USD ($)	Noncontrolling Interest [Member] USD ($)	Capital Units [Member]
Balance at Dec. 31, 2008	$ 1,182.2	$ 1.5	$ 1,350.7	$ 1,668.0	$ (11.7)	$ (1,826.3)	$ 0
Balance (in shares) at Dec. 31, 2008								83.4
Comprehensive income (loss)	(82.2)			(86.6)	4.1		0.3
Issuance of restricted stock to employees, net of forfeitures (in shares)								2.0
Amortization expense in connection with employee stock options and restricted stock	13.0	0.1	12.9
Distributions to noncontrolling interest	(0.2)						(0.2)
Tax effects from vesting of restricted stock and exercise of employee stock options	(1.1)		(1.1)
Tax effects of expired employee stock options	(2.2)		(2.2)
Dividends on common stock	(17.0)			(17.0)
Balance at Dec. 31, 2009	1,092.5	1.6	1,360.3	1,564.4	(7.6)	(1,826.3)	0.1
Balance (in shares) at Dec. 31, 2009								85.4
Comprehensive income (loss)	53.6			53.8	(0.8)		0.6
Issuance of restricted stock to employees, net of forfeitures (in shares)								1.7
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 interest	(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	(17.4)			(17.4)
Treasury stock acquired	(10.7)					(10.7)
Retirement of treasury stock		(0.7)	(839.3)	(997.0)		1,837.0
Treasury stock acquired (in shares)								(0.7)
Balance at Dec. 31, 2010	1,138.3	0.9	541.9	603.8	(8.4)	0	0.1
Balance (in shares) at Dec. 31, 2010								86.4
Comprehensive income (loss)	30.3			50.7	(21.2)		0.8
Issuance of restricted stock to employees, net of forfeitures (in shares)								1.8
Amortization expense in connection with employee stock options and restricted stock	16.7		16.7
Distributions to noncontrolling interest	(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	(17.0)			(17.0)
Treasury stock acquired	(78.0)	(0.1)	(36.5)	(41.4)
Treasury stock acquired (in shares)								(7.2)
Other	0.1			0.1
Balance at Dec. 31, 2011	$ 1,089.4	$ 0.8	$ 521.8	$ 596.2	$ (29.6)	$ 0	$ 0.2
Balance (in shares) at Dec. 31, 2011								81.0