Note 4. Intangible Assets
Components of intangible assets —
| | | | | | June 30, 2025 | | | December 31, 2024 | |
| | Weighted Average Useful Life (years) | | | Gross Carrying Amount | | | Accumulated Impairment and Amortization | | | Net Carrying Amount | | | Gross Carrying Amount | | | Accumulated Impairment and Amortization | | | Net Carrying Amount | |
Amortizable intangible assets | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Core technology | | | 10 | | | $ | 52 | | | $ | (30 | ) | | $ | 22 | | | $ | 47 | | | $ | (25 | ) | | $ | 22 | |
Trademarks and trade names | | | 17 | | | | 3 | | | | (3 | ) | | | | | | | 2 | | | | (2 | ) | | | | |
Customer relationships | | | 10 | | | | 68 | | | | (50 | ) | | | 18 | | | | 65 | | | | (45 | ) | | | 20 | |
Non-amortizable intangible assets | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Trademarks and trade names | | | | | | | 39 | | | | | | | | 39 | | | | 38 | | | | | | | | 38 | |
| | | | | | $ | 162 | | | $ | (83 | ) | | $ | 79 | | | $ | 152 | | | $ | (72 | ) | | $ | 80 | |
Net carrying amounts of intangible assets attributable to each of our operating segments—
| | June 30, 2025 | |
Light Vehicle | | $ | 10 | |
Commercial Vehicle | | | 69 | |
| | $ | 79 | |
Amortization expense related to amortizable intangible assets —
| | Three Months Ended | | | Six Months Ended | |
| | June 30, | | | June 30, | |
| | 2025 | | | 2024 | | | 2025 | | | 2024 | |
Charged to cost of sales | | $ | 1 | | | $ | 1 | | | $ | 2 | | | $ | 3 | |
Charged to amortization of intangibles | | | 2 | | | | 2 | | | | 4 | | | | 4 | |
Total amortization | | $ | 3 | | | $ | 3 | | | $ | 6 | | | $ | 7 | |
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