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Business Combinations - Pro Forma Results of Operation (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Business Acquisition [Line Items] |  |  |  |
Business acquisition, pro forma revenue | $ 1,330.5 | $ 1,289.7 | $ 2,664.1 | $ 2,522.4
Business acquisition, pro forma net income | $ 48.7 | $ 113.3 | 136.2 | $ 220.8
Home Health and Hospice |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business combination, pro forma information, revenue of acquiree since acquisition date, actual |  |  | 3.1 |
Business combination, pro forma information, earnings of acquiree since acquisition date, actual |  |  | $ (0.1) |

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