Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

The following table summarizes changes in our goodwill balance:


Balance at December 31, 2018	$	2,948.0
Goodwill related to 2019 acquisitions	20.9
Impact of foreign currency translation	7.6
Balance at December 31, 2019	2,976.5
Goodwill related to 2020 acquisitions	237.3
Impact of foreign currency translation	61.3
Balance at December 31, 2020	$	3,275.1

Intangible assets, net are summarized as follows:


	December 31, 2020
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Indefinite-lived intangible assets:
Trade names and branding	$	445.0	n/a		$	445.0
Domain portfolio	250.3		n/a		250.3
Contractual-based assets	67.0		n/a		67.0
Finite-lived intangible assets:
Customer-related	857.0		$	(534.7)	322.3
Developed technology	188.1		(90.7)		97.4
Trade names and other	106.9		(33.8)		73.1
	$	1,914.3	$	(659.2)	$	1,255.1


	December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Indefinite-lived intangible assets:
Trade names and branding	$	445.0	n/a		$	445.0
Domain portfolio	148.1		n/a		148.1
Finite-lived intangible assets:
Customer-related	838.4		$	(475.6)	362.8
Developed technology	151.5		(67.3)		84.2
Trade names and other	81.4		(23.8)		57.6
	$	1,664.4	$	(566.7)	$	1,097.7

In December 2020, we completed the purchase of a domain portfolio for $17.0 million in cash, of which $2.0 million will be paid in 2021.

Amortization expense was $127.1 million, $119.5 million and $136.7 million during 2020, 2019 and 2018, respectively. As of December 31, 2020, the weighted-average remaining amortization period for amortizable intangible assets was 62 months for customer-related intangible assets, 39 months for developed technology and 79 months for trade names and other, and was 60 months in total.

Based on the balance of finite-lived intangible assets at December 31, 2020, expected future amortization expense is as follows:


Year Ending December 31:
2021	$	111.5
2022	108.3
2023	89.4
2024	76.3
2025	72.4
Thereafter	34.9
	$	492.8