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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Changes in Carrying Amount of Goodwill | Changes in the carrying amount of goodwill by segment are as follows:
(In millions) | January 1, 2020 |  |  |  | Additions |  | Goodwill reclassified to held for sale |  | Translation |  | December 31, 2020 |  | Additions |  |  |  | Translation |  | December 31, 2021
Electrical Americas | $ | 6,352 |  |  |  |  | $ | 97 |  |  | $ | — |  |  | $ | 7 |  |  | $ | 6,456 |  |  | $ | 971 |  |  |  |  | $ | (10) |  |  | $ | 7,417 |
Electrical Global | 4,106 |  |  |  |  | 7 |  |  | — |  |  | 182 |  |  | 4,295 |  |  | 85 |  |  |  |  | (197) |  |  | 4,183 |
Hydraulics | 921 |  |  |  |  | — |  |  | (907) |  |  | (14) |  |  | — |  |  | — |  |  |  |  | — |  |  | — |
Aerospace | 1,706 |  |  |  |  | 15 |  |  | — |  |  | 56 |  |  | 1,777 |  |  | 1,091 |  |  |  |  | (87) |  |  | 2,781 |
Vehicle | 291 |  |  |  |  | — |  |  | — |  |  | 2 |  |  | 293 |  |  | — |  |  |  |  | (3) |  |  | 290 |
eMobility | 80 |  |  |  |  | — |  |  | — |  |  | 2 |  |  | 82 |  |  | — |  |  |  |  | (2) |  |  | 80 |
Total | $ | 13,456 |  |  |  |  | $ | 119 |  |  | $ | (907) |  |  | $ | 235 |  |  | $ | 12,903 |  |  | $ | 2,147 |  |  |  |  | $ | (299) |  |  | $ | 14,751 |
Schedule of Other Intangible Assets | A summary of other intangible assets is as follows:
| December 31
| 2021 |  | 2020
(In millions) | Historical cost |  | Accumulated amortization |  | Historical cost |  | Accumulated amortization
Intangible assets not subject to amortization |  |  |  |  |  |  |
Trademarks | $ | 1,374 |  |  |  |  | $ | 1,382 |  |  |
Intangible assets subject to amortization |  |  |  |  |  |  |
Customer relationships | $ | 4,752 |  |  | $ | 1,974 |  |  | $ | 3,415 |  |  | $ | 1,795 |
Patents and technology | 1,879 |  |  | 712 |  |  | 1,428 |  |  | 773 |
Trademarks | 951 |  |  | 518 |  |  | 970 |  |  | 505 |
Other | 165 |  |  | 62 |  |  | 91 |  |  | 38 |
Total intangible assets subject to amortization | $ | 7,747 |  |  | $ | 3,266 |  |  | $ | 5,904 |  |  | $ | 3,111 |
Schedule of Amortization Expense of Intangible Assets | Amortization expense related to intangible assets subject to amortization in 2021, and estimated amortization expense for each of the next five years, is as follows:
(In millions) |
2021 | $ | 431 |
2022 | 471 |
2023 | 421 |
2024 | 387 |
2025 | 382 |
2026 | 366 |

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