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Note 4 - Long-term Debt - Long-term Debt Summary (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Long-term debt, gross | $ 6,239 | $ 6,520
Less current portion | (15) | (15)
Long-term debt, less current portion and deferred financing costs | 6,171 | 6,440
Borrowing availability under Revolving Credit Facility | 469 | 496
Revolving Credit Facility [Member] |  |
Long-term debt, gross | 25 | 0
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 | (17) | (21)
The 2021 Term Loan [Member] |  |
Long-term debt, gross | 1,474 | 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 | 2 | 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 | $ (15) | $ (16)

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