Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

The changes in the net carrying amount of goodwill for the nine months ended September 30, 2020 are as follows (in millions):

Balance as of December 31, 2019	$	8,165
Goodwill related to current year acquisitions	315
Goodwill related to disposals	(3)
Foreign currency translation	(15)
Balance as of September 30, 2020	$	8,462

Other intangible assets by asset class are as follows (in millions):

	September 30, 2020						December 31, 2019
	Gross Carrying Amount		Accumulated Amortization and Impairment		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization and Impairment		Net Carrying Amount
Customer-related and contract-based	$	2,273	$	1,690	$	583	$	2,264	$	1,600	$	664
Tradenames (1)	14		12		2		1,029		956		73
Technology and other	421		341		80		380		334		46
Total	$	2,708	$	2,043	$	665	$	3,673	$	2,890	$	783

(1)In 2020, Aon wrote off $1.0 billion of fully amortized tradenames, including the Hewitt and Benfield tradenames. The company no longer expects to receive economic benefits from these tradenames.

The estimated future amortization for finite-lived intangible assets as of September 30, 2020 is as follows (in millions):

Remainder of 2020	$	40
2021	140
2022	100
2023	88
2024	71
2025	52
Thereafter	174
Total	$	665