Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill — The following table summarizes the carrying amount of goodwill by reportable segment for the years ended December 31, 2019 and 2018 (in millions):



	US and Utilities			South America		MCAC		Eurasia				Total
Balance as of December 31, 2018
Goodwill	$	2,786		$	868	$	16	$	122			$	3,792
Accumulated impairment losses	(2,611		)	—		—		(122		)		(2,733		)
Net balance	175			868		16		—				1,059
Balance as of December 31, 2019
Goodwill	2,786			868		16		—			⁽¹⁾	3,670
Accumulated impairment losses	(2,611		)	—		—		—			⁽¹⁾	(2,611		)
Net balance	$	175		$	868	$	16	$	—			$	1,059

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⁽¹⁾	Goodwill and accumulated impairment losses at the Eurasia reportable segment were reduced by $122 million due to the sale of Kilroot in 2019.

Other Intangible Assets — The following table summarizes the balances comprising Other intangible assets in the accompanying Consolidated Balance Sheets (in millions) as of the periods indicated:



	December 31, 2019							December 31, 2018
	Gross Balance		Accumulated Amortization			Net Balance		Gross Balance		Accumulated Amortization			Net Balance
Subject to Amortization
Internal-use software	$	367	$	(228	)	$	139	$	467	$	(344	)	$	123
Contracts	134		(29		)	105		137		(24		)	113
Project development rights	100		(1		)	99		93		(1		)	92
Contractual payment rights ⁽¹⁾	—		—			—		57		(44		)	13
Emissions allowances ⁽²⁾	24		—			24		15		—			15
Other ⁽³⁾	82		(49		)	33		78		(44		)	34
Subtotal	707		(307		)	400		847		(457		)	390
Indefinite-Lived Intangible Assets
Land use rights	21		—			21		21		—			21
Water rights	20		—			20		20		—			20
Transmission rights	23		—			23		—		—			—
Other	5		—			5		5		—			5
Subtotal	69		—			69		46		—			46
Total	$	776	$	(307	)	$	469	$	893	$	(457	)	$	436

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⁽¹⁾	Represent legal rights to receive system reliability payments from the regulator.


⁽²⁾	Acquired or purchased emissions allowances are finite-lived intangible assets that are expensed when utilized and included in net income for the year.


⁽³⁾	Includes management rights, sales concessions, renewable energy credits and incentives, and other individually insignificant intangible assets.

The following tables summarize other intangible assets acquired during the periods indicated (in millions):



December 31, 2019	Amount		Subject to Amortization/Indefinite-Lived	Weighted Average Amortization Period (in years)	Amortization Method
Internal-use software	$	61	Subject to Amortization	5	Straight-line
Contracts	2		Subject to Amortization	35	Straight-line
Project development rights	8		Subject to Amortization	29	Straight-line
Emissions allowances	22		Subject to Amortization	Various	As utilized
Transmission rights	23		Indefinite-Lived	N/A	N/A
Other	5		Various	N/A	N/A
Total	$	121



December 31, 2018	Amount		Subject to Amortization/Indefinite-Lived	Weighted Average Amortization Period (in years)	Amortization Method
Internal-use software	$	67	Subject to Amortization	6	Straight-line
Contracts	50		Subject to Amortization	24	Straight-line
Project development rights	35		Subject to Amortization	23	Straight-line
Emissions allowances	16		Subject to Amortization	Various	As utilized
Other	11		Various	N/A	N/A
Total	$	179

The following table summarizes the estimated amortization expense by intangible asset category for 2020 through 2024:



(in millions)	2020		2021		2022		2023		2024
Internal-use software	$	34	$	31	$	22	$	17	$	15
Contracts	4		4		4		4		4
Other	6		5		5		5		5
Total	$	44	$	40	$	31	$	26	$	24

Intangible asset amortization expense was $45 million, $47 million and $34 million for the years ended December 31, 2019, 2018 and 2017, respectively.