Mirion Technologies, Inc. Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Summary Of Assets And Liabilities Measured At Fair Value (Detail)	Dec. 31, 2020 USD ($)
Assets:
Money market fund held in Trust Account	$ 750,063,158
Liabilities:
Warrant Liability—Private Placement Warrants	48,000,000
Fair Value, Recurring [Member]
Assets:
Money market fund held in Trust Account	750,063,158
Liabilities:
Warrant Liability—Public Warrants	48,000,000
Warrant Liability—Private Placement Warrants	23,676,615
Fair Value, Recurring [Member] \| Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Money market fund held in Trust Account	750,063,158
Liabilities:
Warrant Liability—Public Warrants	48,000,000
Warrant Liability—Private Placement Warrants	0
Fair Value, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets:
Money market fund held in Trust Account	0
Liabilities:
Warrant Liability—Public Warrants	0
Warrant Liability—Private Placement Warrants	0
Fair Value, Recurring [Member] \| Significant Other Unobservable Inputs (Level 3) [Member]
Assets:
Money market fund held in Trust Account	0
Liabilities:
Warrant Liability—Public Warrants	0
Warrant Liability—Private Placement Warrants	$ 23,676,615