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Divestitures - Other Income (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Divestitures [Line Items] |  |  |  |
Total other income | $ 0.5 | $ 120.6 | $ 0.6 | $ 139.3
Disposed of by sale |  |  |  |
Divestitures [Line Items] |  |  |  |
Gain (loss) on inventory |  | 0.8 |  | (11.7)
Other |  | (0.6) |  | (0.6)
Myriad RBM, Inc. | Disposed of by sale |  |  |  |
Divestitures [Line Items] |  |  |  |
Gain (loss) on sale |  | 121.0 |  | 121.0
Myriad myPath LLC laboratory | Disposed of by sale |  |  |  |
Divestitures [Line Items] |  |  |  |
Gain (loss) on sale |  | 0.0 |  | 31.2
Myriad Autoimmune Assets | Disposed of by sale |  |  |  |
Divestitures [Line Items] |  |  |  |
Gain (loss) on sale |  | $ (0.6) |  | $ (0.6)

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