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Supplemental Disclosures to Consolidated Statements of Cash Flows - Schedule of Cash Flow, Supplemental Disclosures (Details) - USD ($) $ in Millions | 2 Months Ended | 4 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2021 | Oct. 19, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2021 | Oct. 20, 2021 | Jul. 01, 2021 | Jun. 30, 2020
Cash Paid For: |  |  |  |  |  |  |  |  |
Cash paid for interest | $ 5.5 |  | $ 10.0 | $ 58.5 | $ 37.1 | $ 37.4 |  |  |
Cash paid for income taxes | 2.9 |  | 4.3 | 26.3 | 12.5 | 19.3 |  |  |
Non-Cash Investing and Financing Activities: |  |  |  |  |  |  |  |  |
Contingent consideration from acquisitions | 0.5 |  | 0.8 | 0.0 | 0.0 | 0.0 |  |  |
Property, plant, and equipment purchases in accounts payable | 0.1 |  | (1.8) | 2.1 | 0.2 | 3.2 |  |  |
Property, plant, and equipment purchases in accrued expense and other liabilities | 0.0 |  | 0.0 | 1.4 | 0.0 | 0.0 |  |  |
Acquisition purchases in accrued expense and other liabilities | 0.0 |  | 0.1 | 0.0 | 0.0 | 2.1 |  |  |
Common Shares issued to Mirion Sellers in Mirion Business Combination | 420.7 | $ 420.7 | 0.0 | 0.0 | 0.0 | 0.0 |  |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 84.0 | 84.0 | 101.8 | 128.8 | 73.5 | 101.1 |  |  |
Restricted cash—current | 0.6 | 0.6 | 0.8 | 0.6 | 0.5 | 0.8 |  |  |
Restricted cash—non-current | 0.7 | 0.7 | 0.5 | 1.1 | 1.0 | 0.5 |  |  |
Total cash, cash equivalents, and restricted cash | $ 85.3 | $ 85.3 | $ 103.1 | $ 130.5 | $ 75.0 | $ 102.4 | $ 750.2 | $ 102.4 | $ 120.0

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