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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2021
Goodwill and Other Intangible Assets |
Goodwill and Other Intangible Assets | 5. Goodwill and Other Intangible Assets Goodwill was $9,028 million and $8,994 million as of December 31, 2021 and 2020, respectively. The $34 million increase in goodwill during 2021 is primarily related to acquisitions, partially offset by divestitures. As discussed in Note 2, we perform our annual impairment test of goodwill balances for our reporting units using a measurement date of October 1. We will also perform interim tests if an impairment indicator exists. See Notes 11, 17 and 19 for additional information related to goodwill. Our other intangible assets consisted of the following as of December 31 (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Customer |  | Covenants |  | Licenses, |  | ​ | ​
​ | ​ | and Supplier | ​ | Not-to- | ​ | Permits | ​ | ​ | ​
​ |  | Relationships |  | Compete |  | and Other |  | Total
2021 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Intangible assets | ​ | $ | 1,355 | ​ | $ | 43 | ​ | $ | 142 | ​ | $ | 1,540
Less: Accumulated amortization | ​ |  | (538) | ​ |  | (26) | ​ |  | (78) | ​ |  | (642)
​ | ​ | $ | 817 | ​ | $ | 17 | ​ | $ | 64 | ​ | $ | 898
2020 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Intangible assets | ​ | $ | 1,436 | ​ | $ | 68 | ​ | $ | 142 | ​ | $ | 1,646
Less: Accumulated amortization | ​ | ​ | (497) | ​ | ​ | (46) | ​ | ​ | (79) | ​ | ​ | (622)
​ | ​ | $ | 939 | ​ | $ | 22 | ​ | $ | 63 | ​ | $ | 1,024
​ Amortization expense for other intangible assets was $143 million, $107 million and $106 million for 2021, 2020 and 2019, respectively. Amortization expense for other intangible assets for 2021 increased, as compared with 2020 and 2019, due to the amortization of acquired intangible assets related to our acquisition of Advanced Disposal. Additional information related to other intangible assets acquired through business combinations is included in Note 17. As of December 31, 2021, we had $19 million of licenses, permits and other intangible assets that are not subject to amortization because they do not have stated expirations or have routine, administrative renewal processes. As of December 31, 2021, we expect annual amortization expense related to other intangible assets to be $130 million in 2022, $115 million in 2023, $105 million in 2024, $97 million in 2025 and $77 million in 2026.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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