v3.26.3
Goodwill and Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2026
Intangible Asset, Goodwill and Other [Abstract]  
Schedule of Goodwill
The following table shows changes in the carrying amount of goodwill by reportable segment as of September 30, 2026 and December 31, 2025 (in millions):
Nuclear & SafetyMedicalConsolidated
Balance—December 31, 2025$1,238.4 $634.0 $1,872.4 
Measurement period adjustments(0.1)— (0.1)
Translation adjustment(12.8)— (12.8)
Balance—September 30, 2026$1,225.5 $634.0 $1,859.5 
Gross carrying amounts and cumulative goodwill impairment losses are as follows (in millions):
September 30, 2026December 31, 2025
Gross Carrying AmountCumulative ImpairmentGross Carrying AmountCumulative Impairment
Goodwill$2,071.3 $(211.8)$2,084.2 $(211.8)
Schedule of Intangible Asset, Finite-Lived A summary of intangible assets useful lives, gross carrying value and related accumulated amortization is below (in millions):
September 30, 2026
Original Average
 Life in Years
Gross Carrying
 Amount
Accumulated
 Amortization
Net Book
 Value
Customer relationships
6 - 13
$525.2 $(278.3)$246.9 
Distributor relationships
7 - 13
61.0 (36.0)25.0 
Developed technology
5 - 16
341.7 (171.7)170.0 
Trade names
3 - 10
114.7 (51.2)63.5 
Remaining performance obligations and other
1 - 4
15.3 (4.6)10.7 
Total$1,057.9 $(541.8)$516.1 
December 31, 2025
Original Average
 Life in Years
Gross Carrying
 Amount
Accumulated
 Amortization
Net Book
 Value
Customer relationships
6 - 13
$524.6 $(240.5)$284.1 
Distributor relationships
7 - 13
61.2 (30.6)30.6 
Developed technology
5 - 16
345.0 (140.1)204.9 
Trade names
3 - 10
115.8 (43.1)72.7 
Remaining performance obligations and other
1 - 4
15.1 (1.1)14.0 
Total$1,061.7 $(455.4)$606.3 
Schedule of Finite-lived Intangible Assets Amortization Expense
Aggregate amortization expense for intangible assets included in cost of revenues and operating expenses was as follows (in millions):
Three Months Ended September 30, 2026Three Months Ended September 30, 2025Nine Months Ended September 30, 2026Nine Months Ended September 30, 2025
Amortization expense for intangible assets in:
Cost of revenues$7.0 $6.9 $20.9 $20.6 
Operating expenses$22.4 $18.8 $69.5 $55.7 
Schedule of Estimated Future Amortization of Intangible Assets
Estimated future amortization of intangible assets is as follows (in millions):
Remainder of 2026$28.3 
Year ending December 31:
2027103.4 
202886.1 
202969.9 
203062.0 
Thereafter166.4 
Total$516.1