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Intangible Assets and Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Carrying amount of intangible assets | The following table summarizes the carrying amount of intangible assets as of December 31, 2023 and 2022:
| As of December 31,
| 2023 |  | 2022
| (Dollars in millions)
Acquired contractual rights | $924.1 |  | $920.2
Accumulated amortization | (262.0) |  | (126.3)
Finite-lived intangible assets, net | 662.1 |  | 793.9
Goodwill | 104.0 |  | 103.9
Intangible Assets, net | $766.1 |  | $897.8
Schedule of estimated amortization expense | The following table summarizes the expected amortization expense for 2024 through 2028 and thereafter (Dollars in millions):
Year ending December 31, |
2024 | $131.1
2025 | 131.1
2026 | 131.0
2027 | 120.9
2028 | 113.8
Thereafter | 34.2
| $662.1

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