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v3.23.1

Goodwill and Other Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | The following table provides a reconciliation of changes in goodwill for the three months ended March 31, 2023:
|  |  |  |  | Consolidated
|  |  |  |  | (in millions)
Balance at December 31, 2022 |  |  |  |  | $ | 181.6 |
Foreign currency translation |  |  |  |  | 0.1 |
Balance at March 31, 2023 |  |  |  |  | $ | 181.7 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] | The following table provides a reconciliation of the gross carrying amount and associated accumulated amortization for AAM's other intangible assets, which are all subject to amortization:
| March 31, |  | December 31,
| 2023 |  | 2022
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
| (in millions)
Capitalized computer software | $ | 52.4 |  |  | $ | (44.6) |  |  | $ | 7.8 |  |  | $ | 52.2 |  |  | $ | (43.2) |  |  | $ | 9.0 |
Customer platforms | 856.2 |  |  | (380.6) |  |  | 475.6 |  |  | 856.2 |  |  | (364.7) |  |  | 491.5 |
Customer relationships | 53.0 |  |  | (20.5) |  |  | 32.5 |  |  | 53.0 |  |  | (19.7) |  |  | 33.3 |
Technology and other | 154.1 |  |  | (74.9) |  |  | 79.2 |  |  | 154.1 |  |  | (71.7) |  |  | 82.4 |
Total | $ | 1,115.7 |  |  | $ | (520.6) |  |  | $ | 595.1 |  |  | $ | 1,115.5 |  |  | $ | (499.3) |  |  | $ | 616.2 |

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