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Acquisitions and Dispositions of Businesses (Acquisitions) (Narrative) (Details) $ in Millions | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2023 business | Nov. 30, 2022 USD ($) | Aug. 31, 2022 business | May 31, 2022 business | Dec. 31, 2022 USD ($) business | Mar. 31, 2023 USD ($) | Jul. 31, 2022 | Jul. 05, 2022 USD ($) store
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition purchase price |  |  |  |  | $ 143.2 |  |  |
Goodwill expected to be deductible for income tax purposes |  |  |  |  | $ 38.5 |  |  |
Number of businesses acquired | business |  |  |  |  | 7 |  |  |
Automotive [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Floor plan payables |  |  |  |  |  | $ 76.9 |  |
Number of businesses acquired | business |  |  |  |  | 2 |  |  |
Graham Healthcare Group [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Number of businesses acquired | business | 2 |  | 2 | 2 | 5 |  |  |
CSI Pharmacy Holding Company, LLC |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests |  | $ 1.2 |  |  |  |  |  |
Graham Holdings Company [Member] | CSI Pharmacy Holding Company, LLC |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Percentage Ownership After Change in Noncontrolling Interest |  |  |  |  |  | 76.50% |  |
Auto dealerships [Member] | Automotive [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Amount Borrowed to Finance Business Acquisition |  |  |  |  |  |  |  | $ 77.4
Floor plan payables |  |  |  |  |  |  |  | $ 10.9
Number of Stores | store |  |  |  |  |  |  |  | 2
Applied Behavior Analysis clinics | Graham Healthcare Group [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Percentage of interest acquired |  |  |  |  |  |  | 100.00% |

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