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Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2024
Intangible Assets |
Schedule of Intangible Assets Subject to Amortization, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, 2024 |  | December 31, 2023 |
​ | ​ | Gross | ​ | ​ | ​ | Net | ​ | Gross | ​ | ​ | ​ | Net | ​
​ | ​ | carrying | ​ | Accumulated | ​ | carrying | ​ | carrying | ​ | Accumulated | ​ | carrying |
​ |  | amount |  | amortization |  | amount |  | amount |  | amortization |  | amount |
​ | ​ | amounts in millions |
Customer relationships | ​ | $ | 515 | ​ | (163) | ​ | 352 | ​ | 515 | ​ | (132) | ​ | 383 | ​
Other amortizable intangible assets | ​ |  | 162 | ​ | (91) | ​ | 71 | ​ | 156 | ​ | (78) | ​ | 78 | ​
Total | ​ | $ | 677 | ​ | (254) | ​ | 423 | ​ | 671 | ​ | (210) | ​ | 461 | ​
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | Amortization expense for amortizable intangible assets for each of the five succeeding fiscal years is estimated to be (amounts in millions): ​
​ | ​ | ​ | ​ | ​
Remainder of 2024 | ​ | $ | 15 | ​
2025 | ​ | $ | 55 | ​
2026 | ​ | $ | 52 | ​
2027 | ​ | $ | 50 | ​
2028 | ​ | $ | 48 | ​
​

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
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