The fair values and weighted-average useful lives of the acquired intangible assets by category were as follows (in millions, except years): | | | | | | | | | | | | | Estimated Fair Values | | Weighted-Average Useful Lives (in Years) | Developed technology | $ | 97 | | | 4 | Customer relationships | 28 | | | 8 | Trade name | 1 | | | 1 | Total acquisition-related intangible assets | $ | 126 | | | 5 |
The fair values and weighted-average useful lives of the acquired intangible assets by category were as follows (in millions, except years): | | | | | | | | | | | | | Estimated Fair Values | | Weighted-Average Useful Lives (in Years) | Developed technology | $ | 133 | | | 5 | Customer relationships | 116 | | | 9 | Backlog | 2 | | | 3 | Trade name | 2 | | | 1 | Total acquisition-related intangible assets | $ | 253 | | | 7 |
The fair values and weighted-average useful lives of the acquired intangible assets by category were as follows (in millions, except years): | | | | | | | | | | | | | Estimated Fair Values | | Weighted-Average Useful Lives (in Years) | | Developed technology | $ | 111 | | | 8 | | Customer relationships | 23 | | | 14 | Trade name | 1 | | | 1 | Total acquisition-related intangible assets | $ | 135 | | | 9 |
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