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Business Combinations - Pro Forma Results of Operation (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Business Acquisition [Line Items] |  |
Business acquisition, pro forma revenue | $ 1,333.6 | $ 1,232.7
Business acquisition, pro forma net income | 87.5 | $ 107.5
Home Health and Hospice |  |
Business Acquisition [Line Items] |  |
Business combination, pro forma information, revenue of acquiree since acquisition date, actual | 1.8 |
Business combination, pro forma information, earnings of acquiree since acquisition date, actual | $ 0.2 |

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