| **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, 2011                                                   | $ 201.0 | $ 1.0        | $ 2,874.1                      | $ (2,609.7)         | $ (0.2)                                       | $ (148.8)      | $ 84.6                   |
| Balance at beginning of period, Shares at Dec. 31, 2011                                           |    | 95.2         |                           |                |                                          |           |                     |
| Net income                                                                                        | 176.6   |         |                           | 138.0               |                                          |           |                     |
| Net income attributable to nonredeemable noncontrolling interest                                  | 35.6    |         |                           |                |                                          |           | 35.6                     |
| Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest, Total | 173.6   |         |                           |                |                                          |           |                     |
| Receipt of treasury stock                                                                         | (11.9)  |         |                           |                |                                          | (11.9)         |                     |
| Receipt of treasury stock, Shares                                                                 |    | (0.7)        |                           |                |                                          |           |                     |
| Dividends declared on convertible perpetual preferred stock                                       | (18.1)  |         | (18.1)                         |                |                                          |           |                     |
| Stock-based compensation                                                                          | 18.1    |         | 18.1                           |                |                                          |           |                     |
| Distributions declared                                                                            | (34.2)  |         |                           |                |                                          |           | (34.2)                   |
| Capital contributions from consolidated affiliates                                                | 11.4    |         |                           |                |                                          |           | 11.4                     |
| Consolidation of St. Vincent Rehabilitation Hospital                                              | 13.9    |         |                           |                |                                          |           | 13.9                     |
| Other                                                                                             | 1.6     |         | 1.6                            |                | 2.1                                           | (2.1)          | 0                        |
| Other, Shares                                                                                     |    | 1.2          |                           |                |                                          |           |                     |
| Balance at end of period at Sep. 30, 2012                                                         | 355.4   | 1.0          | 2,875.7                        | (2,471.7)           | 1.9                                           | (162.8)        | 111.3                    |
| Balance at end of period, Shares at Sep. 30, 2012                                                 |    | 95.7         |                           |                |                                          |           |                     |
| 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                                                                                        | 317.2   |         |                           | 274.7               |                                          |           |                     |
| Net income attributable to nonredeemable noncontrolling interest                                  | 38.4    |         |                           |                |                                          |           | 38.4                     |
| Net Income (Loss), 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 through tender offer                                                  | (234.1) |         |                           |                |                                          | (234.1)        |                     |
| Repurchases of common stock through tender offer, 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         |                           |                |                                          |           |                     |

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the nonredeemable noncontrolling interest.
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Cost of common stock repurchased during the period and currently held in treasury.
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Number of common stock shares reacquired during the period and currently held in treasury.
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Value of common stock reacquired during the period and currently held in treasury.
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This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".
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| - Definition
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.
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| - Definition
Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.
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Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash.
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| - Definition
Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.
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| - Definition
Portion of net income (loss) attributable to nonredeemable noncontrolling interest.
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| - Definition
Increase in noncontrolling interest balance because of a business combination that occurred during the period.
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| - Definition
Total contributions made by each class of partners (i.e., general, limited and preferred partners).
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| - Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.
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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.
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| - Definition
Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.
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| - Definition
This element represents movements included in the statement of changes in stockholders' equity which are not separately disclosed or provided for elsewhere in the taxonomy.
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This element represents movements in the number of shares included in the statement of changes in stockholders' equity which are not separately disclosed or provided for elsewhere in the taxonomy.
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| - Definition
Number of share options (or share units) exercised during the current period.
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| - Definition
Number of shares that have been repurchased during the period and are being held in treasury.
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