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GOODWILL AND INTANGIBLE ASSETS
 3 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND INTANGIBLE ASSETS GOODWILL AND INTANGIBLE ASSETS
The changes in the carrying amount of goodwill, net of impairment, were as follows:
DxBLSTotal
Balance as of December 31, 2024$5,102.5 $1,267.2 $6,369.7 
    Goodwill acquired during the period
36.4 — 36.4 
    Foreign currency impact and other adjustments to Goodwill
(7.3)22.3 15.0 
Balance as of March 31, 2025$5,131.6 $1,289.5 $6,421.1 
During the three months ended March 31, 2025, the Company did not record a goodwill or intangible asset impairment charge.
The cumulative goodwill impairment for the Company through March 31, 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:
 March 31, 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$4,184.1 $(1,601.8)$2,582.3 $4,114.7 $(1,540.7)$2,574.0 
Patents, licenses, and technology
3-15541.8 (307.7)234.1 541.0 (298.3)242.7 
Non-compete agreements3-5187.4 (90.8)96.6 180.2 (83.9)96.3 
Other
1-1540.1 (23.4)16.7 39.9 (21.5)18.4 
$4,953.4 $(2,023.7)$2,929.7 $4,875.8 $(1,944.4)$2,931.4 
Indefinite-lived intangible assets:
Canadian and other licenses
$557.5 
N/A
$557.5 $557.5 
N/A
$557.5 
Total intangible assets
$5,510.9 $(2,023.7)$3,487.2 $5,433.3 $(1,944.4)$3,488.9 
Amortization of intangible assets for the three months ended March 31, 2025, and 2024, was $69.6 and $60.1, respectively. The amortization expense of intangible assets is estimated to be $208.4 for the remainder of 2025, $266.4 in 2026, $253.5 in 2027, $245.8 in 2028, $232.1 in 2029, and $1,723.5 thereafter.