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GOODWILL AND INTANGIBLE ASSETS
 6 Months Ended
Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND INTANGIBLE ASSETS GOODWILL AND INTANGIBLE ASSETS
The balances, net of impairment, and changes in the carrying amount of goodwill were as follows:
DxBLSTotal
Balance as of December 31, 2024$5,102.5 $1,267.2 $6,369.7 
    Goodwill acquired during the period
41.1 — 41.1 
    Foreign currency impact and other adjustments to Goodwill
22.3 118.0 140.3 
Balance as of June 30, 2025$5,165.9 $1,385.2 $6,551.1 
During the six months ended June 30, 2025, the Company did not record a goodwill or intangible asset impairment charge.
The cumulative goodwill impairment for the Company as of June 30, 2025, and December 31, 2024, was $648.5 and represents all of the goodwill of the Company’s Early Development Research Laboratories reporting unit within the BLS segment.
The components of identifiable intangible assets were as follows:
 June 30, 2025December 31, 2024
Range of Useful Lives (in Years)Gross Carrying AmountAccumulated AmortizationNet Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Definite-lived intangible assets:
Customer relationships10-36$4,304.1 $(1,692.1)$2,612.0 $4,114.7 $(1,540.7)$2,574.0 
Patents, licenses, and technology
3-15547.9 (321.8)226.1 541.0 (298.3)242.7 
Non-compete agreements3-5167.9 (94.9)73.0 180.2 (83.9)96.3 
Other
1-1539.9 (25.3)14.6 39.9 (21.5)18.4 
$5,059.8 $(2,134.1)$2,925.7 $4,875.8 $(1,944.4)$2,931.4 
Indefinite-lived intangible assets:
Canadian and other licenses
$568.7 
N/A
$568.7 $557.5 
N/A
$557.5 
Total intangible assets
$5,628.5 $(2,134.1)$3,494.4 $5,433.3 $(1,944.4)$3,488.9 
Amortization of intangible assets was $68.3 and $62.2 for the three months ended June 30, 2025, and 2024, respectively, and was $137.9 and $122.3 for the six months ended June 30, 2025, and 2024, respectively. The amortization expense of intangible assets is estimated to be $142.2 for the remainder of 2025, $268.0 in 2026, $255.1 in 2027, $247.4 in 2028, $234.7 in 2029, and $1,778.3 thereafter.