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Note 4 - Long-term Debt - Long-term Debt Summary (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Long-term debt, gross | $ 4,035 | $ 4,035
Long-term debt, less deferred financing costs | 3,981 | 3,974
Borrowing availability under Revolving Credit Facility | 299 | 200
The 2017 Term Loan [Member] |  |
Long-term debt, gross | 595 | 595
The 2019 Term Loan [Member] |  |
Long-term debt, gross | 1,190 | 1,190
2026 Notes [Member] |  |
Long-term debt, gross | 700 | 700
Unamortized deferred loan costs | (5) | (6)
Unamortized premium | 3 | 3
2027 Notes [Member] |  |
Long-term debt, gross | 750 | 750
Unamortized deferred loan costs | (9) | (10)
2030 Notes [Member] |  |
Long-term debt, gross | 800 | 800
Unamortized deferred loan costs | (13) | (14)
The 2019 Senior Credit Facility [Member] |  |
Long-term debt, gross | 1,785 |
Unamortized deferred loan costs | $ (30) | $ (34)

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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