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Basis of Presentation - Net Operating Revenues (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | $ 1,333.6 | $ 1,230.4
Inpatient Rehabilitation |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 1,059.3 | 959.9
Home Health and Hospice |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 274.3 | 270.5
Medicare |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 907.3 | 838.4
Medicare | Inpatient Rehabilitation |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 689.9 | 614.5
Medicare | Home Health and Hospice |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 217.4 | 223.9
Medicare Advantage |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 190.5 | 186.4
Medicare Advantage | Inpatient Rehabilitation |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 156.0 | 158.4
Medicare Advantage | Home Health and Hospice |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 34.5 | 28.0
Managed care |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 150.3 | 126.5
Managed care | Inpatient Rehabilitation |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 131.5 | 112.2
Managed care | Home Health and Hospice |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 18.8 | 14.3
Medicaid |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 45.2 | 42.8
Medicaid | Inpatient Rehabilitation |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 41.7 | 39.0
Medicaid | Home Health and Hospice |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 3.5 | 3.8
Other third-party payors |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 10.1 | 12.1
Other third-party payors | Inpatient Rehabilitation |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 10.1 | 12.1
Other third-party payors | Home Health and Hospice |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 0.0 | 0.0
Workers’ compensation |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 6.2 | 5.8
Workers’ compensation | Inpatient Rehabilitation |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 6.1 | 5.7
Workers’ compensation | Home Health and Hospice |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 0.1 | 0.1
Patients |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 5.2 | 5.1
Patients | Inpatient Rehabilitation |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 5.2 | 4.9
Patients | Home Health and Hospice |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 0.0 | 0.2
Other income |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 18.8 | 13.3
Other income | Inpatient Rehabilitation |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | 18.8 | 13.1
Other income | Home Health and Hospice |  |
Disaggregation of Revenue [Line Items] |  |
Net operating revenues | $ 0.0 | $ 0.2

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