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Goodwill and Other Intangible Assets - Definite-lived Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Definite-lived Intangible assets |  |  |
Gross Carrying Amount | $ 953 | $ 951 |
Accumulated Amortization | (691) | (653) |
Net Carrying Amount | 262 | 298 |
Aggregate amortization expense for definite-lived intangible assets | 56 | 52 | $ 45
Impairments of finite-lived intangible assets | 8 | 1 | $ 0
Estimated future intangible amortization expense |  |  |
2025 | 53 |  |
2026 | 48 |  |
2027 | 36 |  |
2028 | 26 |  |
2029 | 22 |  |
Customer relationships |  |  |
Definite-lived Intangible assets |  |  |
Gross Carrying Amount | 370 | 380 |
Accumulated Amortization | (204) | (191) |
Net Carrying Amount | 166 | 189 |
Contracts |  |  |
Definite-lived Intangible assets |  |  |
Gross Carrying Amount | 226 | 228 |
Accumulated Amortization | (218) | (219) |
Net Carrying Amount | 8 | 9 |
Other |  |  |
Definite-lived Intangible assets |  |  |
Gross Carrying Amount | 357 | 343 |
Accumulated Amortization | (269) | (243) |
Net Carrying Amount | $ 88 | $ 100 |

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