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Intangible Asset, Net
 12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Asset, Net Intangible Assets, Net
Intangible assets, net of accumulated amortization, consisted of the following (in millions):

December 31, 2022December 31, 2021
Estimated Useful
Lives (Years)		CostAccumulated
Amortization		NetCostAccumulated
Amortization		Net
Customer contracts and relationships (1)
1 – 29
$2,817 $(695)$2,122 $2,445 $(510)$1,935 
Other agreements
1 – 70
35 (12)23 36 (11)25 
Intangible assets (2)
$2,852 $(707)$2,145 $2,481 $(521)$1,960 
(1)The increase in intangible assets related to Customer contracts and relationships in 2022 is primarily associated with the assets recognized upon consolidation of Cactus II. 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, 2022.

The majority of our finite-lived intangible assets are amortized under the declining balance method. Amortization expense for finite-lived intangible assets for the years ended December 31, 2022, 2021 and 2020 was $254 million, $122 million and $90 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):

2023$296 
2024$266 
2025$241 
2026$207 
2027$186