
	Dx		DD		Total
	March 31, 2023		March 31, 2023		March 31, 2023
Balance as of December 31, 2022	$	4,533.5	$	3,587.5	$	8,121.0




Foreign currency impact and other adjustments to goodwill	(19.2)		14.2		(5.0)
Balance as of March 31, 2023	$	4,514.3	$	3,601.7	$	8,116.0

The Company assesses goodwill and indefinite-lived intangibles for impairment at least annually or whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. The Company recognizes an impairment charge for the amount by which the reporting unit's carrying amount exceeds its fair value.

Although the Company believes that the current assumptions and estimates used in its goodwill analysis are reasonable, supportable, and appropriate, the Company's business could be impacted by unfavorable changes, including those that impact the existing assumptions used in the impairment analysis. Various factors could reasonably be expected to unfavorably impact existing assumptions: primarily a worsening economic environment and protracted economic downturn and related impacts, including delays in revenue from new customers; increases in customer termination activity; or increases in operating costs.

Accordingly, there can be no assurance that the estimates and assumptions made for the purposes of the goodwill impairment analysis will prove to be accurate predictions of future performance.

The Company will continue to monitor the financial performance of, and assumptions for, its reporting units. A significant increase in the discount rate, decrease in the revenue and terminal growth rates, decreased operating margin, or substantial reductions in end markets and volume assumptions, could have a negative impact on the estimated fair value of the reporting units. A future impairment charge for goodwill or intangible assets could have a material effect on the Company's consolidated financial position and results of operations.

The components of identifiable intangible assets are as follows:


	March 31, 2023						December 31, 2022
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Customer relationships	$	4,723.8	$	(1,605.4)	$	3,118.4	$	4,681.1	$	(1,546.4)	$	3,134.7
Patents, licenses and technology	574.8		(298.7)		276.1		574.1		(291.1)		283.0
Non-compete agreements	83.4		(56.3)		27.1		86.6		(50.5)		36.1
Trade name	16.4		(4.6)		11.8		16.4		(3.5)		12.9
Land use right	10.3		(9.0)		1.3		10.3		(8.8)		1.5
Canadian licenses	468.9		—		468.9		468.7		—		468.7
Other	14.2		(5.5)		8.7		14.2		(4.2)		10.0
	5,891.8		(1,979.5)		3,912.3		5,851.4		(1,904.5)		3,946.9

Amortization of intangible assets for the three months ended March 31, 2023, and 2022, was $69.3 and $67.1, respectively. The amortization expense for the net carrying amount of intangible assets is estimated to be $206.2 for the remainder of fiscal 2023, $267.5 in fiscal 2024, $255.3 in fiscal 2025, $245.5 in fiscal 2026, $233.9 in fiscal 2027, and $2,141.3 thereafter.

LabCorp Diagnostics [Member]

Goodwill [Line Items]

Balance as of January 1

$ 4,533.5

Adjustments to goodwill

(19.2)

Balance at end of period

4,514.3

4,533.5

Covance Drug Development [Member]

Goodwill [Line Items]

Balance as of January 1