Income Taxes - Summary of Income Tax Contingencies (Details) - USD ($) $ in Millions |
2 Months Ended | 4 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Dec. 31, 2021 |
Oct. 19, 2021 |
Jun. 30, 2021 |
Jun. 30, 2020 |
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| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | ||||
| Balance, beginning of period | $ 6.5 | $ 5.0 | $ 0.8 | $ 13.9 |
| Increases resulting from the Mirion Business Combination | 6.5 | 0.0 | 0.0 | 0.0 |
| Current year additions to positions | 0.1 | 1.5 | 2.6 | 0.0 |
| Additions from other business combinations | 0.2 | 0.0 | 1.7 | 0.0 |
| Lapse of applicable statute of limitations | 0.0 | 0.0 | (0.1) | (13.1) |
| Reductions to prior year positions | (0.2) | 0.0 | 0.0 | 0.0 |
| Foreign currency translation adjustments | 0.0 | 0.0 | 0.0 | 0.0 |
| Balance, end of period | 6.6 | 6.5 | $ 5.0 | $ 0.8 |
| GSAH | ||||
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | ||||
| Balance, beginning of period | $ 0.0 | |||
| Balance, end of period | $ 0.0 | |||
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- Definition Unrecognized Tax Benefits, Increase Resulting from Other Acquisitions No definition available.
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in unrecognized tax benefits resulting from acquisitions. No definition available.
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in unrecognized tax benefits resulting from foreign currency translation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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