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GOODWILL AND OTHER INTANGIBLE ASSETS
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS
Changes in the carrying amount of goodwill by segment are as follows:
(In millions)January 1, 2023TranslationDecember 31, 2023AdditionsTranslationDecember 31, 2024
Electrical Americas$7,402 $13 $7,415 $17 $(35)$7,396 
Electrical Global3,929 109 4,038 — (196)3,842 
Aerospace2,844 57 2,901 — (45)2,856 
Vehicle287 2 289 — (4)285 
eMobility334 1 334 — (1)333 
Total$14,796 $181 $14,977 $17 $(281)$14,713 
The 2024 additions to goodwill relate primarily to the anticipated synergies of acquiring Exertherm. The allocation of the Exertherm purchase price is preliminary and will be completed during the measurement period.
A summary of other intangible assets is as follows:
December 31
20242023
(In millions)Historical
cost		Accumulated
amortization		Historical
cost		Accumulated
amortization
Intangible assets not subject to amortization
Trademarks$1,200 $1,207 
Intangible assets subject to amortization
Customer relationships$4,659 $2,577 $4,742 $2,423 
Patents and technology1,979 1,056 1,990 948 
Trademarks1,107 693 1,123 642 
Other169 131 176 133 
Total intangible assets subject to amortization$7,915 $4,456 $8,031 $4,146 
Amortization expense related to intangible assets subject to amortization in 2024, and estimated amortization expense for each of the next five years, is as follows:
(In millions)
2024$405 
2025396 
2026381 
2027372 
2028308 
2029271