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Business Segments (Narrative) (Details) $ in Millions |  | 6 Months Ended
--- | --- | ---
Mar. 22, 2018 USD ($) | Jun. 30, 2025 USD ($) segment
Business Segments [Line Items] |  |
Number of reportable segments | segment |  | 7
Kaplan University Transaction [Member] | Purdue University Global [Member] | Education [Member] | Higher Education [Member] |  |
Business Segments [Line Items] |  |
Accounts Receivable |  | $ 85.3
Accounts Receivable, Noncurrent |  | $ 19.8
Advance Related To Kaplan University Transaction | $ 20.0 |

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