| **Investments in and Advances to Nonconsolidated Affiliates - Tables 2 & 3 (Details) (USD $)In Millions, unless otherwise specified** | 12 Months Ended                                                                                                            |
|-------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------|
||
| **Assets-**                                                                                                                               |                                                                                                                       |   |   |
| Current                                                                                                                                   | $ 9.6us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets                                             | $ 16.6us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets |   |
| Noncurrent                                                                                                                                | 13.1us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets                                           | 36.2us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets |   |
| Total assets                                                                                                                              | 22.7us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets                                                     | 52.8us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets |   |
| **Liabilities and equity-**                                                                                                               |                                                                                                                       |   |   |
| Current liabilities                                                                                                                       | 0.7us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities                                          | 2.4us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities |   |
| Noncurrent liabilities                                                                                                                    | 0.1us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities                                       | 0.7us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities |   |
| **Partners' capital and shareholders' equity-**                                                                                           |                                                                                                                       |   |   |
| HealthSouth                                                                                                                               | 8.2us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets                                                               | 18.9us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets |   |
| Outside partners                                                                                                                          | 13.7us-gaap_EquityMethodInvestmentSummarizedFinancialInformationMinorityInterest                                           | 30.8us-gaap_EquityMethodInvestmentSummarizedFinancialInformationMinorityInterest |   |
| Total liabilities and equity                                                                                                              | 22.7us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity                                       | 52.8us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity |   |
| **Combined Statements of Operations of Equity Method Affiliates**                                                                         |                                                                                                                       |   |   |
| Net operating revenues                                                                                                                    | 50.2us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue                                                    | 74.3us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue | 83.3us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue |
| Operating expenses                                                                                                                        | (25.9)hls_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses                                            | (43.6)hls_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses | (48.1)hls_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses |
| Income from continuing operations, net of tax                                                                                             | 30.9us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems | 24.6us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems | 28.3us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems |
| Net income                                                                                                                                | $ 30.9us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss                                            | $ 24.6us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss | $ 28.3us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss |

| X                                                                                                                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of assets reported by an equity method investment of the entity.
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| - Definition
The amount of current assets reported by an equity method investment of the entity.
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| - Definition
The amount of current liabilities reported by an equity method investment of the entity.
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| - Definition
The amount of income (loss) from continuing operations before extraordinary items reported by an equity method investment of the entity.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of liabilities and equity reported by an equity method investment of the entity.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of equity attributable to noncontrolling interests of an equity method investment of the entity.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of net income (loss) reported by an equity method investment of the entity.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of noncurrent assets reported by an equity method investment of the entity.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of noncurrent liabilities reported by an equity method investment of the entity.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.
+ References
No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This item represents the entity's ownership percentage in the investee multiplied by the investee's total equity.
+ References
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