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Debt and Credit Facility | 12 Months Ended
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Dec. 31, 2022
Debt Disclosure [Abstract] |
Debt and Credit Facility | 9. Debt and C redit Facility Senior Notes During the years ended December 31, 2021, December 31, 2020 and December 31, 2019, we issued fixed rate unsecured notes with varying maturity dates (“Senior Notes”). The stated interest rates and aggregate principal amounts of our Senior Notes were, respectively: (i) 4.50% and $550.0 million (“4.50% Senior Notes”); (ii) 6.50% and $350.0 million (“6.50% Senior Notes”); and (iii) 4.625% and $500.0 million (“4.625% Senior Notes”). Our Senior Notes do not require us to make any mandatory redemptions or sinking fund payments. The following table summarizes key details of our Senior Notes:
|  |  |  |  |  | As of December 31, |
|  |  |  |  |  |  |  | 2022 |  |  | 2021 |
|  | Issuance Date |  | Maturity |  | Effective Interest Rate |  | (in millions of dollars) |
4.50% Senior Notes |  | May 2021 |  | June 2031 |  | 4.7% |  | $ | 550.0 |  |  | $ | 550.0 |
6.50% Senior Notes 1 |  | April/May 2020 |  | May 2025 |  | 6.8% |  |  | — |  |  |  | — |
4.625% Senior Notes |  | November 2019 |  | March 2028 |  | 4.8% |  |  | 500.0 |  |  |  | 500.0 |
Total debt |  |  |  |  |  |  |  |  | 1,050.0 |  |  |  | 1,050.0 |
Unamortized issuance costs |  |  |  |  |  |  |  |  | (11.9 | ) |  |  | (13.7 | )
Total carrying amount |  |  |  |  |  |  |  | $ | 1,038.1 |  |  | $ | 1,036.3 |
1. In May 2021, we redeemed in full our 6.50% Senior Notes at a redemption price of 108.83% of the principal amount plus $1.3 million of accrued and unpaid interest for a total net cash outflow of $382.2 million. Upon redemption of the 6.50% Senior Notes, we recorded a loss on extinguishment of debt of $35.9 million within Other income (expense), net, in our Statements of Consolidated (Loss) Income, which included the premium payment of $30.9 million and a write-off of the remaining unamortized premium and debt issuance costs of $5.0 million. The following table presents the fair value of our outstanding Senior Notes, which are Level 1 liabilities (in millions of dollars):
|  |  |  |  |  | As of December 31, |
|  |  |  |  |  | 2022 |  |  | 2021 |
4.50% Senior Notes |  |  |  |  |  | $ | 438.7 |  |  | $ | 542.6 |
4.625% Senior Notes |  |  |  |  |  | $ | 440.4 |  |  | $ | 506.9 |
Revolving Credit Facility In October 2019, we entered into a revolving credit facility with Wells Fargo Bank, National Association, as administrative agent, and the other financial institutions party thereto (the “Revolving Credit Facility”). Joining us as borrowers (“Co-Borrowers”) under the Revolving Credit Facility are four of our wholly owned domestic operating subsidiaries: (i) Kaiser Aluminum Investments Company; (ii) Kaiser Aluminum Fabricated Products, LLC; (iii) Kaiser Aluminum Washington, LLC; and (iv) Kaiser Aluminum Warrick, LLC. In April 2022, we entered into Amendment No. 3 to our Revolving Credit Facility. As amended, the Revolving Credit Facility, among other things: (i) increased the commitment from $375.0 million to $575.0 million (of which up to a maximum of $50.0 million may be utilized for letters of credit); (ii) extended the maturity date from the earlier of (a) February 2024 (if certain conditions were met) and (b) October 2024 to April 2027; (iii) removed eligible equipment from the borrowing base and as collateral; and (iv) updated relevant benchmark provisions from LIBOR to Term SOFR. The following table summarizes availability and usage of our Revolving Credit Facility as determined by a borrowing base calculated as of December 31, 2022 (in millions of dollars):
Revolving Credit Facility borrowing commitment |  | $ | 575.0 |
Borrowing base availability |  | $ | 575.0 |
Less: Outstanding borrowings under Revolving Credit Facility |  |  | — |
Less: Outstanding letters of credit under Revolving Credit Facility |  |  | (17.2 | )
Remaining borrowing availability |  | $ | 557.8 |
Interest Expense The following table presents interest expense relating to our Senior Notes and Revolving Credit Facility (in millions of dollars):
|  | Year Ended December 31, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Senior Notes interest expense, including debt issuance cost amortization |  | $ | 49.6 |  |  | $ | 49.0 |  |  | $ | 40.2 |
Revolving Credit Facility commitment fees and finance cost amortization |  |  | 2.3 |  |  |  | 1.7 |  |  |  | 1.7 |
Interest expense capitalized as construction in progress |  |  | (3.6 | ) |  |  | (1.2 | ) |  |  | (1.0 | )
Total interest expense |  | $ | 48.3 |  |  | $ | 49.5 |  |  | $ | 40.9 |

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI https://asc.fasb.org/topic&trid=2208564 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1C -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1I -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1I -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(c)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1C -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1C -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1E -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1I -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 + Details
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