Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (USD $) In Millions	Total	Common Stock	Capital in Excess of Par Value	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interests
Balance at beginning of period at Dec. 31, 2012	$ 403.5	$ 1.0	$ 2,876.6	$ (2,424.7)	$ 1.4	$ (163.3)	$ 112.5
Balance at beginning of period, Shares at Dec. 31, 2012		95.7
Net income	274.7			274.7
Net income attributable to nonredeemable noncontrolling interest	38.4						38.4
Net income, including portion attributable to nonredeemable noncontrolling interest, total	313.1
Receipt of treasury stock	(5.8)					(5.8)
Receipt of treasury stock, Shares		(0.3)
Dividends declared on common stock	(15.9)		(15.9)
Dividends declared on convertible perpetual preferred stock	(17.2)		(17.2)
Stock-based compensation	19.0		19.0
Stock options exercised	7.5		7.5
Stock options exercised, Shares		0.3
Distributions declared	(30.1)						(30.1)
Repurchases of common stock	(234.1)					(234.1)
Repurchases of common stock, Shares		(9.1)
Other	2.0		4.5		(1.6)	(1.0)	0.1
Other, Shares		0.8
Balance at end of period at Sep. 30, 2013	442.0	1.0	2,874.5	(2,150.0)	(0.2)	(404.2)	120.9
Balance at end of period, Shares at Sep. 30, 2013		87.4
Balance at beginning of period at Dec. 31, 2013	468.7	1.0	2,849.4	(2,101.1)	(0.1)	(404.6)	124.1
Balance at beginning of period, Shares at Dec. 31, 2013		88.0
Net income	179.9			179.9
Net income attributable to nonredeemable noncontrolling interest	38.9						38.9
Net income, including portion attributable to nonredeemable noncontrolling interest, total	218.8
Receipt of treasury stock	(9.7)					(9.7)
Receipt of treasury stock, Shares		(0.3)
Dividends declared on common stock	(50.6)		(50.6)
Dividends declared on convertible perpetual preferred stock	(4.7)		(4.7)
Stock-based compensation	19.3		19.3
Stock options exercised	7.4		7.4
Stock options exercised, Shares		0.3
Stock warrants exercised	6.3		6.3
Stock warrants exercised, Shares		0.2
Distributions declared	(33.7)						(33.7)
Repurchases of common stock	(43.1)					(43.1)
Repurchases of common stock, Shares		(1.3)
Consolidation of Fairlawn Rehabilitation Hospital	14.0						14.0
Other	0.1		0.9			(0.7)	(0.1)
Other, Shares		0.9
Balance at end of period at Sep. 30, 2014	$ 592.8	$ 1.0	$ 2,828.0	$ (1,921.2)	$ (0.1)	$ (458.1)	$ 143.2
Balance at end of period, Shares at Sep. 30, 2014		87.8