Business Combinations and Acquisitions - Summary of Consideration Transferred by GSAH (Details) - USD ($) $ in Millions |
Oct. 20, 2021 |
Dec. 31, 2021 |
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| Business Combination, Separately Recognized Transactions [Line Items] | ||
| Ending balance, cash consideration paid by GSAH | $ 1,300.0 | |
| Class A Common Stock | ||
| Business Combination, Separately Recognized Transactions [Line Items] | ||
| Common stock, shares issued (in shares) | 30,401,902 | 199,523,292 |
| Class B Common Stock | ||
| Business Combination, Separately Recognized Transactions [Line Items] | ||
| Common stock, shares issued (in shares) | 8,560,540 | 8,560,540 |
| GSAH | ||
| Business Combination, Separately Recognized Transactions [Line Items] | ||
| Beginning balance, cash consideration paid by GSAH | $ 1,310.0 | |
| Cash repayment of existing Mirion TopCo third-party debt | 903.6 | |
| Reimbursement of Mirion TopCo transaction costs | 11.7 | |
| Ending balance, cash consideration paid by GSAH | 2,225.3 | |
| Shares issued to the Mirion TopCo sellers at fair value | 407.0 | |
| Total consideration transferred | $ 2,632.3 |
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- Definition Beginning Balance, Payments to Acquire Businesses, Gross No definition available.
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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