As described in Note 18, beginning in the first quarter of 2022, we revised the presentation of segment information to reflect changes in the way we manage and evaluate our business. As such, we now have two operating segments, which are also our reporting units. We evaluated the goodwill of each reporting unit for impairment immediately before and after this change; no impairment was identified.


	A&C		Core		Total



Balance at December 31, 2020	1,408.3		1,866.8		3,275.1
Goodwill related to acquisitions	134.0		177.6		311.6
Impact of foreign currency translation	(19.1)		(25.4)		(44.5)
Other	(0.7)		(0.7)		(1.4)
Balance at December 31, 2021	1,522.5		2,018.3		3,540.8
Goodwill related to acquisitions	—		56.3		56.3
Impact of foreign currency translation	(31.7)		(43.0)		(74.7)
Purchase accounting adjustments related to prior period acquisitions	6.2		8.3		14.5
Balance at December 31, 2022	$	1,497.0	$	2,039.9	$	3,536.9

Intangible assets, net are summarized as follows:


	December 31, 2022
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Indefinite-lived intangible assets:
Trade names and branding	$	445.0	n/a		$	445.0
Domain portfolio	243.2		n/a		243.2
Contractual-based assets	256.8		n/a		256.8
Finite-lived intangible assets:
Customer-related	487.7		$	(309.0)	178.7
Developed technology	243.9		(171.1)		72.8
Trade names and other	109.8		(54.1)		55.7
	$	1,786.4	$	(534.2)	$	1,252.2


	December 31, 2021
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Indefinite-lived intangible assets:
Trade names and branding	$	445.0	n/a		$	445.0
Domain portfolio	246.8		n/a		246.8
Contractual-based assets	253.8		n/a		253.8
Finite-lived intangible assets:
Customer-related	535.1		$	(279.3)	255.8
Developed technology	243.5		(133.1)		110.4
Trade names and other	118.4		(45.5)		72.9
	$	1,842.6	$	(457.9)	$	1,384.7

During 2021, we purchased intangible assets for a total of $200.1 million in cash. One of these purchases also includes a variable earn-out payment of up to $12.0 million based on the achievement of specified future performance conditions. The variable earn-out will be recognized only if the future performance conditions are achieved. These purchases primarily consisted of a number of top-level domains (TLDs), of which $186.8 million were recorded as indefinite-lived contractual-based intangible assets.

Amortization expense was $128.9 million, $127.9 million and $127.1 million during 2022, 2021 and 2020, respectively. As of December 31, 2022, the weighted-average remaining amortization period for amortizable intangible assets was 38 months for customer-related intangible assets, 31 months for developed technology and 54 months for trade names and other, and was 39 months in total.

Based on the balance of finite-lived intangible assets at December 31, 2022, expected future amortization expense is as follows:


Year Ending December 31:
2023	$	107.9
2024	86.3
2025	78.7
2026	26.6
2027	4.6
Thereafter	3.1
	$	307.2