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GOODWILL AND OTHER INTANGIBLES (Tables) | 12 Months Ended
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Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | A summary of the changes in the carrying amount of goodwill is presented in the following tables. The prior period balances have been recast for inter-segment transitions of certain businesses that were completed during 2022. Refer to Note 24, “Reportable Segments and Related Information” for more information.
| 2024
(in millions) | Turbos & Thermal Technologies |  | Drivetrain & Morse Systems |  | PowerDrive Systems |  | Battery & Charging Systems |  | Total
Gross goodwill balance, January 1 | $ | 1,257 |  |  | $ | 1,126 |  |  | $ | 481 |  |  | $ | 651 |  |  | $ | 3,515 |
Accumulated impairment losses, January 1 | (502) |  |  | — |  |  | — |  |  | — |  |  | (502) |
Net goodwill balance, January 1 | $ | 755 |  |  | $ | 1,126 |  |  | $ | 481 |  |  | $ | 651 |  |  | $ | 3,013 |
Goodwill during the year: |  |  |  |  |  |  |  |  |
Impairment | — |  |  | — |  |  | (468) |  |  | (109) |  |  | (577) |
Measurement period adjustments 1 | — |  |  | — |  |  | 6 |  |  | — |  |  | 6 |
Other, primarily translation adjustment | (22) |  |  | (6) |  |  | (19) |  |  | (38) |  |  | (85) |
Net goodwill balance, December 31 | $ | 733 |  |  | $ | 1,120 |  |  | $ | — |  |  | $ | 504 |  |  | $ | 2,357 |
| 2023
(in millions) | Turbos & Thermal Technologies |  | Drivetrain & Morse Systems |  | PowerDrive Systems |  | Battery & Charging Systems |  | Total
Gross goodwill balance, January 1 | $ | 1,246 |  |  | $ | 1,126 |  |  | $ | 480 |  |  | $ | 628 |  |  | $ | 3,480 |
Accumulated impairment losses, January 1 | (502) |  |  | — |  |  | — |  |  | — |  |  | (502) |
Net goodwill balance, January 1 | $ | 744 |  |  | $ | 1,126 |  |  | $ | 480 |  |  | $ | 628 |  |  | $ | 2,978 |
Goodwill during the year: |  |  |  |  |  |  |  |  |
Acquisitions 1 | — |  |  | — |  |  | 14 |  |  | 8 |  |  | 22 |
Measurement period adjustments 1 | — |  |  | — |  |  | — |  |  | (6) |  |  | (6) |
Other, primarily translation adjustment | 11 |  |  | — |  |  | (13) |  |  | 21 |  |  | 19 |
Net goodwill balance, December 31 | $ | 755 |  |  | $ | 1,126 |  |  | $ | 481 |  |  | $ | 651 |  |  | $ | 3,013 |
_____________________________ 1 Acquisitions and measurement period adjustments relate to the Company’s 2023 purchases of SSE and Eldor.
Schedule of Intangible Assets Gross Roll Forward | The Company’s other intangible assets, primarily from acquisitions, consist of the following:
|  |  | December 31, 2024 |  | December 31, 2023
(in millions) | Estimated useful lives (years) |  | Gross carrying amount |  | Accumulated amortization |  | Net carrying amount |  | Gross carrying amount |  | Accumulated amortization |  | Net carrying amount
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |
Patented and unpatented technology | 5 - 15 |  | $ | 352 |  |  | $ | 172 |  |  | $ | 180 |  |  | $ | 364 |  |  | $ | 145 |  |  | $ | 219 |
Customer relationships | 6 - 15 |  | 610 |  |  | 321 |  |  | 289 |  |  | 641 |  |  | 305 |  |  | 336 |
Miscellaneous | 2 - 5 |  | 9 |  |  | 7 |  |  | 2 |  |  | 9 |  |  | 6 |  |  | 3 |
Total amortized intangible assets |  |  | 971 |  |  | 500 |  |  | 471 |  |  | 1,014 |  |  | 456 |  |  | 558 |
Unamortized trade names |  |  | 3 |  |  | — |  |  | 3 |  |  | 6 |  |  | — |  |  | 6 |
Total other intangible assets |  |  | $ | 974 |  |  | $ | 500 |  |  | $ | 474 |  |  | $ | 1,020 |  |  | $ | 456 |  |  | $ | 564 |
A roll forward of the gross carrying amounts and related accumulated amortization of the Company’s other intangible assets is presented below:
| Gross carrying amounts |  | Accumulated amortization
(in millions) | 2024 |  | 2023 |  | 2024 |  | 2023
Beginning balance, January 1 | $ | 1,020 |  |  | $ | 1,003 |  |  | $ | 456 |  |  | $ | 384 |
Acquisitions and measurement period adjustments 1 (Note 2) | (4) |  |  | 14 |  |  | — |  |  | — |
Write-offs | (3) |  |  | — |  |  | — |  |  | — |
Amortization | — |  |  | — |  |  | 69 |  |  | 67 |
Translation adjustment | (39) |  |  | 3 |  |  | (25) |  |  | 5 |
Ending balance, December 31 | $ | 974 |  |  | $ | 1,020 |  |  | $ | 500 |  |  | $ | 456 |
_____________________________ 1 Acquisitions relate to the Company’s 2023 purchases of SSE and Eldor.

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