| Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Cash and cash equivalents | 69 | 13 | 21 | 12 | 193 | 31 | 23 | 39 |
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| Accounts Receivable, after Allowance for Credit Loss, Current | 82 | 75 | 66 | 70 | 41 | 40 | 39 | 32 |
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| Accounts receivable-other | 2 | 9 | 10 | 4 | 17 | 12 | 10 | 2 |
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| Prepaid expenses and other | 12 | 15 | 22 | 29 | 31 | 38 | 39 | 39 |
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| Total current assets | 165 | 112 | 119 | 115 | 282 | 121 | 110 | 112 |
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| Right-of-use lease assets-operating | - | - | 27 | 25 | 17 | 15 | 20 | 19 |
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| Property, plant and equipment, net | 925 | 1,053 | 1,074 | 1,100 | 722 | 726 | 830 | 831 |
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| Franchise operating rights | 952 | 809 | 800 | 786 | 620 | 585 | 278 | 278 |
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| Goodwill | 384 | 409 | 409 | 409 | 225 | 225 | 225 | 225 |
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| Finite-Lived Intangible Assets, Net | 6 | 4 | 3 | 2 | 2 | 1 | 1 | 1 |
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| Other non-current assets | 10 | 32 | 42 | 51 | 38 | 44 | 50 | 46 |
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| Total assets | 2,442 | 2,420 | 2,472 | 2,487 | 1,907 | 1,717 | 1,515 | 1,513 |
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| Accounts payable-trade, net | 26 | 42 | 47 | 44 | 50 | 46 | 60 | 42 |
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| Accrued interest | 4 | 5 | 3 | 4 | 1 | 0 | 2 | 20 |
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| Operating Lease, Liability, Current | - | - | 6 | 7 | 5 | 5 | 4 | 5 |
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| Accrued liabilities and other | 95 | 93 | 96 | 99 | 219 | 69 | 60 | 73 |
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| Long-Term Debt and Lease Obligation, Current | 24 | 24 | 31 | 38 | 18 | 18 | 19 | 20 |
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| Unearned Service Revenue, Current | - | 60 | 45 | 46 | 28 | 27 | 25 | 24 |
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| Total current liabilities | 191 | 224 | 227 | 236 | 321 | 165 | 170 | 183 |
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| Long-Term Debt and Lease Obligation | 2,227 | 2,271 | 2,260 | 2,229 | 724 | 725 | 916 | 997 |
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| Long-term lease liability-operating | - | - | 23 | 21 | 14 | 12 | 18 | 17 |
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| Deferred income taxes, net | - | 201 | 193 | 201 | 258 | 225 | 126 | 91 |
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| Other non-current liabilities | 6 | 13 | 15 | 13 | 20 | 16 | 28 | 15 |
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| Total liabilities | 2,646 | 2,710 | 2,718 | 2,699 | 1,336 | 1,142 | 1,257 | 1,304 |
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| Common Stock, Value, Issued | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
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| Additional paid-in capital | 300 | 313 | 323 | 334 | 349 | 375 | 392 | 403 |
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| Retained earnings (accumulated deficit) | -500 | -519 | -474 | -460 | 311 | 308 | 20 | -38 |
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| Treasury stock at cost, 15,409,417 and 15,036,843 shares as of December 31, 2024 and December 31, 2023, respectively | 5 | 78 | 80 | 81 | 89 | 109 | 155 | 157 |
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| Total stockholders' equity | -204 | -290 | -246 | -212 | 571 | 575 | 258 | 209 |
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| Total liabilities and stockholders' equity | 2,442 | 2,420 | 2,472 | 2,487 | 1,907 | 1,717 | 1,515 | 1,513 |
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