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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Schedule of Income Before Income Tax Domestic and Foreign Current and Deferred Portions of Income Tax Benefits
The domestic and foreign components of (loss) before provision for income taxes and the provision for income taxes were as follows (in millions):
Successor
From
October 20, 2021 through
December 31, 2021
United States$(26.8)
Foreign(3.0)
Net loss before benefit from income taxes$(29.8)
Income tax provision (benefit):
Current:
Federal$— 
State and local0.8 
Foreign3.8 
Total current provision$4.6 
Deferred:
Federal$(5.4)
State and local(1.2)
Foreign(4.8)
Total deferred benefit$(11.4)
Total benefit from income taxes$(6.8)
Predecessor
From
July 1, 2021 through
October 19, 2021
Fiscal Year Ended
June 30, 2021
Fiscal Year Ended
June 30, 2020
Fiscal Year Ended
June 30, 2019
United Kingdom$(41.2)$(125.3)$(118.2)$(96.3)
United States(61.2)(53.8)(24.5)(42.0)
Other foreign(8.9)14.818.112.1
Net loss before benefit from income taxes$(111.3)$(164.3)$(124.6)$(126.2)
Income tax provision (benefit):
Current:
United Kingdom0.10.30.61.1
United States1.42.4(6.2)1.9
Other foreign2.09.416.19.6
Total current provision$3.5 $12.1 $10.5 $12.6 
Deferred:
United Kingdom(0.4)(0.3)
United States(7.0)(15.5)1.3(7.2)
Other foreign(2.1)(2.5)(16.9)(9.3)
Total deferred benefit$(9.1)$(18.0)$(16.0)$(16.8)
Total benefit from income taxes$(5.6)$(5.9)$(5.5)$(4.2)
Schedule of Effective Income Tax Rate Reconciliation
The provision (benefit) for income taxes differs from the amount computed by applying the U.S. Federal statutory income tax rate to loss before provision for income taxes as follows:
Successor
From
October 20, 2021 through
December 31, 2021
Income tax at U.S. Federal statutory rate21 %
State and local taxes, net of federal impact%
Foreign tax rate differential— %
Change in valuation allowance%
Stock-based compensation expense(4)%
Warrant liability change in fair value%
Other— %
Total effective income tax rate23 %

The provision (benefit) for income taxes differs from the amount computed by applying the U.K. statutory income tax rate to loss before provision for income taxes as follows:
Predecessor
From
July 1, 2021 through
October 19, 2021
Fiscal Year Ended
June 30, 2021
Fiscal Year Ended
June 30, 2020
Fiscal Year Ended
June 30, 2019
Income tax at U.K. statutory rate19 %19 %19 %19 %
Subpart F & GILTI— %(1)%(2)%(4)%
Foreign taxes, including U.S.%(1)%%%
Transaction costs(3)%— %— %— %
Change in valuation allowance(2)%%(8)%%
Unrecognized tax benefits(1)%(1)%11 %— %
Nondeductible interest expense(7)%(14)%(17)%(14)%
Stock-based compensation expense(2)%— %— %— %
Other— %— %— %(2)%
Total effective income tax rate%%%%
Schedule of Deferred Tax Assets and Liabilities
The components of the Company’s net deferred tax assets and liabilities consist of the following (in millions):
SuccessorPredecessor
December 31, 2021June 30, 2021June 30, 2020
Deferred tax assets:
Net operating loss carryforwards$24.5 $29.2 $29.2 
Federal and state credit carryforwards13.914.316.4
Property, plant and equipment0.60.62.6
Deferred and other revenue differences8.64.0
Interest carryforwards12.111.24.9
Other reserves and accrued expenses15.415.09.0
Lease liabilities12.5
Other assets2.23.74.7
Total deferred tax assets89.878.066.8
Less: valuation allowance(20.7)(29.1)(29.0)
$69.1 $48.9 $37.8 
SuccessorPredecessor
December 31, 2021June 30, 2021June 30, 2020
Deferred tax liabilities:
Purchased technologies and other intangibles$(192.1)$(75.0)$(58.2)
Deferred and other revenue differences(7.5)(8.1)(0.8)
Property, plant and equipment(11.9)(3.9)(3.0)
Lease right of use assets(11.4)
Other liabilities(1.4)(1.8)(4.1)
Total deferred tax liabilities(224.3)(88.8)(66.1)
Net deferred tax liabilities$(155.2)$(39.9)$(28.3)
Summary of Valuation Allowance
SuccessorPredecessor
From
October 20, 2021 through
December 31, 2021
From
July 1, 2021 through
October 19, 2021
Fiscal Year Ended
June 30, 2021
Fiscal Year Ended
June 30, 2020
Valuation allowance balance – beginning of period$1.0 $29.1 $29.0 $18.7 
Increases/(decreases) resulting from the Mirion Business Combination19.7— — — 
Increases resulting from other business combinations— — 0.50.3
Other increases— 1.68.610.0
Other decreases$— $— $(9.0)$— 
Valuation allowance balance – end of period$20.7 $30.7 $29.1 $29.0 
Summary of Income Tax Contingencies A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions):
SuccessorPredecessor
From
October 20, 2021 through
December 31, 2021
From
July 1, 2021 through
October 19, 2021
Fiscal Year Ended
June 30, 2021
Fiscal Year Ended
June 30, 2020
Balance, beginning of period$— $5.0 $0.8 $13.9 
Increases resulting from the Mirion Business Combination6.5
Current year additions to positions0.11.52.6
Additions from other business combinations0.21.7
Lapse of applicable statute of limitations(0.1)(13.1)
Reductions to prior year positions(0.2)
Foreign currency translation adjustments
Balance, end of period$6.6 $6.5 $5.0 $0.8 
Schedule of Open Tax Years by Major Jurisdictions
In many cases, the Company’s uncertain tax positions are related to tax years that remain subject to examination by tax authorities. The following describes open tax years by major tax jurisdictions as of December 31, 2021:
 Years Open
Jurisdiction: 
Canada
2015 – 2021
France
2019 – 2021
Germany
2016 – 2021
United Kingdom
2016 – 2021
United States—Federal
2016 – 2021
United States—State
2004 – 2021