Consolidated Statement of Shareholders' Equity (USD $) In Millions, except Share data	Total	Capital in Excess of Par Value	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interests	Common Stock [Member]
Balance at beginning of period at Dec. 31, 2010	$ (2.8)	$ 2,872.9	$ (2,818.4)	$ 0.5	$ (141.8)	$ 83.0	$ 1.0
Balance at beginning of period, shares at Dec. 31, 2010							93,400,000
Net income	254.6		208.7
Net income attributable to nonredeemable noncontrolling interest	42.3					42.3
Net income, including portion attributable to nonredeemable noncontrolling interest	251.0
Convertible perpetual preferred stock dividends	(26.0)	(26.0)
Stock-based compensation	20.3	20.3
Distributions declared	(40.5)					(40.5)
Other	(1.0)	6.9		(0.7)	(7.0)	(0.2)
Other, Shares							1,800,000
Balance at end of period at Dec. 31, 2011	201.0	2,874.1	(2,609.7)	(0.2)	(148.8)	84.6	1.0
Balance at end of period, shares at Dec. 31, 2011							95,200,000
Net income	235.9		185.0
Net income attributable to nonredeemable noncontrolling interest	47.1					47.1
Net income, including portion attributable to nonredeemable noncontrolling interest	232.1
Receipt of treasury stock	(11.9)				(11.9)
Receipt of treasury stock, shares							(700,000)
Convertible perpetual preferred stock dividends	(23.9)	(23.9)
Stock-based compensation	24.1	24.1
Distributions declared	(45.4)					(45.4)
Capital contributions from consolidated affiliates	12.4					12.4
Consolidation of St. Vincent Rehabilitation Hospital	13.9					13.9
Other	1.2	2.3		1.6	(2.6)	(0.1)
Other, Shares							1,200,000
Balance at end of period at Dec. 31, 2012	403.5	2,876.6	(2,424.7)	1.4	(163.3)	112.5	1.0
Balance at end of period, shares at Dec. 31, 2012							95,700,000
Net income	381.4		323.6
Net income attributable to nonredeemable noncontrolling interest	52.0					52.0
Net income, including portion attributable to nonredeemable noncontrolling interest	375.6
Receipt of treasury stock	(5.8)				(5.8)
Receipt of treasury stock, shares							(300,000)
Dividends declared on common stock	(32.0)	(32.0)
Convertible perpetual preferred stock dividends	(21.0)	(21.0)
Stock-based compensation	24.8	24.8
Stock options exercised	8.2	8.2
Sock options exercised, Shares	338,000						300,000
Stock warrants exercised	15.3	15.3
Stock warrants exercised, Shares							500,000
Distributions declared	(40.4)					(40.4)
Repurchase of common stock through tender offer	(234.1)				(234.1)
Repurchase of common stock through tender offer, Shares	(9,100,000)
Repurchase of preferred stock through convertible exchange	(71.6)	(71.6)
Equity portion of convertible debt	71.0	71.0
Tax impact of equity portion of convertible debt	(28.0)	(28.0)
Other	3.2	6.1		(1.5)	(1.4)
Other, Shares							900,000
Balance at end of period at Dec. 31, 2013	$ 468.7	$ 2,849.4	$ (2,101.1)	$ (0.1)	$ (404.6)	$ 124.1	$ 1.0
Balance at end of period, shares at Dec. 31, 2013							88,000,000