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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2020
GOODWILL AND OTHER INTANGIBLES [Abstract] |
Schedule of Goodwill | The balances and changes in the carrying amount of Goodwill (net of cumulative goodwill impairments) by segment are as follows (in millions of dollars):
|  | United States |  | Canada |  | Other businesses |  | Total
Balance at January 1, 2019 |  | $ | 192 |  |  | $ | 120 |  |  | $ | 112 |  |  | $ | 424 |
Translation |  | — |  |  | 6 |  |  | (1) |  |  | 5 |
Balance at December 31, 2019 |  | 192 |  |  | 126 |  |  | 111 |  |  | 429 |
Acquisition |  | — |  |  | — |  |  | 15 |  |  | 15 |
Impairment |  | — |  |  | — |  |  | (58) |  |  | (58) |
Translation |  | — |  |  | 3 |  |  | 2 |  |  | 5 |
Balance at December 31, 2020 |  | $ | 192 |  |  | $ | 129 |  |  | $ | 70 |  |  | $ | 391 |
Schedule of Finite-Lived Intangible Assets by Major Class | The balances and changes in Intangible assets - net are as follows (in millions of dollars):
|  |  | As of December 31,
|  |  | 2020 |  | 2019
| Weighted average life |  | Gross carrying amount |  | Accumulated amortization/ impairment |  | Net carrying amount |  | Gross carrying amount |  | Accumulated amortization/impairment |  | Net carrying amount
Customer lists and relationships | 11.8 years |  | $ | 223 |  |  | $ | 171 |  |  | $ | 52 |  |  | $ | 401 |  |  | $ | 301 |  |  | $ | 100 |
Trademarks, trade names and other | 14.1 years |  | 36 |  |  | 22 |  |  | 14 |  |  | 36 |  |  | 20 |  |  | 16 |
Non-amortized trade names and other | — |  | 28 |  |  | — |  |  | 28 |  |  | 100 |  |  | 38 |  |  | 62 |
Capitalized software(1) | 4.2 years |  | 461 |  |  | 327 |  |  | 134 |  |  | 626 |  |  | 500 |  |  | 126 |
Total intangible assets | 7.1 years |  | $ | 748 |  |  | $ | 520 |  |  | $ | 228 |  |  | $ | 1,163 |  |  | $ | 859 |  |  | $ | 304 |
(1) During the fourth quarter of 2020, the Company completed a $223 million non-cash retirement of fully amortized capitalized software as a result of the Company's review of long-lived assets. The retirement includes assets that became inactive in prior years and has no impact on amortization expense.
Schedule of Estimated Amortization Expense | Estimated amortization expense for future periods is as follows (in millions of dollars):
Year |  | Expense
2021 |  | $ | 63 |
2022 |  | 48 |
2023 |  | 36 |
2024 |  | 18 |
2025 |  | 16 |
Thereafter |  | 19 |
Total |  | $ | 200 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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