Other Long-Term Assets, Net

12 Months Ended

Dec. 31, 2020

Other Assets [Abstract]

Other Long-Term Assets, Net

Other Long-Term Assets, Net

Other long-term assets, net of accumulated amortization, consisted of the following (in millions):

		December 31, 2020						December 31, 2019
	Estimated Useful Lives (Years)	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
Customer contracts and relationships (1)	3 – 29	$	1,291	$	(519)	$	772	$	1,134	$	(463)	$	671
Property tax abatement	13	23		(20)		3		23		(18)		5
Other agreements	1 – 70	40		(10)		30		42		(11)		31
Intangible assets (2)		1,354		(549)		805		1,199		(492)		707
Other		165		(3)		162		152		(1)		151
Other long-term assets, net		$	1,519	$	(552)	$	967	$	1,351	$	(493)	$	858

(1)Amounts for the year ended December 31, 2020 include intangible assets associated with the acquisition of FM Gathering. See Note 7 for additional information.

(2)We include rights-of-way, which are intangible assets, in our pipeline and related facilities amounts within property and equipment. See Note 6 for a discussion of property and equipment.

Intangible assets that have finite lives are tested for impairment when events or circumstances indicate that the carrying value may not be recoverable. We did not recognize any impairments of finite-lived intangible assets during the three years ended December 31, 2020.

Amortization expense for finite-lived intangible assets for the years ended December 31, 2020, 2019 and 2018 was $90 million, $76 million and $66 million, respectively. We estimate that our amortization expense related to finite-lived intangible assets for the next five years will be as follows (in millions):

2021	$	87
2022	$	86
2023	$	82
2024	$	80
2025	$	77