8.  Goodwill
 
Changes in the amounts of our goodwill for each of the years ended December 31, 2020 and 2019 are summarized by reporting unit as follows:  
 Natural Gas Pipelines RegulatedNatural Gas Pipelines Non-Regulated
CO2
Products PipelinesProducts Pipelines TerminalsTerminalsTotal
(In millions)
Gross goodwill
$15,892 $5,812 $1,528 $2,125 $221 $1,573 $27,151 
Accumulated impairment losses
(1,643)(1,597)— (1,197)(70)(679)(5,186)
December 31, 201814,249 4,215 1,528 928 151 894 21,965 
Divestitures(a)— (422)— — — (92)(514)
Transfer(b)— (450)— 450 — — — 
December 31, 201914,249 3,343 1,528 1,378 151 802 21,451 
Impairments(c)— (1,000)(600)— — — (1,600)
Transfer— — — — — — — 
December 31, 202014,249 2,343 928 1,378 151 802 19,851 
Gross goodwill
15,892 4,940 1,528 2,575 221 1,481 26,637 
Accumulated impairment losses
(1,643)(2,597)(600)(1,197)(70)(679)(6,786)
December 31, 2020$14,249 $2,343 $928 $1,378 $151 $802 $19,851 
(a)2019 includes $514 million related to the KML and U.S. Cochin Sale. See Note 4 for more information.
(b)Effective January 1, 2019, for segment reporting purposes, certain assets were transferred among our business segments which resulted in the transfer of goodwill from the Natural Gas Pipelines Non-Regulated reporting unit to the Products Pipelines reporting unit. See Note 16 for more information.
(c)See Note 3 “Impairments and Losses and Gains on Divestitures—Goodwill Impairments” for further information regarding our goodwill impairments.

Historical Timeline

Fiscal YearFiled
2020Feb 5, 2021Showing above
2019Feb 12, 2020
2017Feb 9, 2018
2016Feb 10, 2017
2015Feb 16, 2016

About Goodwill & Intangibles Disclosures

Goodwill and intangible asset disclosures reveal the premium paid in acquisitions and how management assesses whether that premium retains its value. Since goodwill is no longer amortized under US GAAP, the annual impairment test is the only mechanism that adjusts carrying values downward — making the assumptions behind that test critically important for investors.

Key signals: a history of goodwill impairments suggests management consistently overpays for acquisitions. Watch the gap between reporting unit fair value and carrying amount — when fair value exceeds carrying amount by less than 10-20%, a small decline in business performance could trigger a write-down. For finite-lived intangibles, examine useful life assumptions across customer relationships, technology, and trade names; aggressive estimates inflate near-term earnings. Compare total intangibles-to-total-assets ratios against peers to assess acquisition dependency. Rising goodwill as a percentage of equity can signal balance sheet fragility.