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Note 4 - Long-term Debt - Long-term Debt Summary (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Long-term debt, gross | $ 6,210 | $ 6,520
Less current portion | (15) | (15)
Long-term debt, less deferred financing costs | 6,145 | 6,440
Borrowing availability under Revolving Credit Facility | 494 | 496
The 2017 Term Loan [Member] |  |
Long-term debt, gross | 0 | 295
Unamortized deferred loan costs | 0 | (4)
The 2019 Term Loan [Member] |  |
Long-term debt, gross | 1,190 | 1,190
Unamortized deferred loan costs | (14) | (21)
The 2021 Term Loan [Member] |  |
Long-term debt, gross | 1,470 | 1,485
Unamortized deferred loan costs | (4) | (4)
2026 Notes [Member] |  |
Long-term debt, gross | 700 | 700
Unamortized deferred loan costs | (3) | (4)
Unamortized premium | 1 | 2
2027 Notes [Member] |  |
Long-term debt, gross | 750 | 750
Unamortized deferred loan costs | (6) | (7)
2030 Notes [Member] |  |
Long-term debt, gross | 800 | 800
Unamortized deferred loan costs | (10) | (11)
Notes 2031 [Member] |  |
Long-term debt, gross | 1,300 | 1,300
Unamortized deferred loan costs | $ (14) | $ (16)

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- Definition Amount, after accumulated amortization, of debt premium. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-1A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482949/835-30-55-8 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D + Details
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