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Derivatives, Hedges and Financial Instruments | 12 Months Ended
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Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Derivatives, Hedges and Financial Instruments | 9. Derivatives, Hedges and Financial Instruments For the periods presented, the following significant instruments are accounted for on a fair value basis: Natural Gas Contracts Periodically, we entered into certain forward natural gas contracts, which are accounted for on a mark-to-market basis. We utilize these natural gas contracts as economic hedges for risk management purposes but are not designated as hedging instruments. At December 31, 2020, our natural gas contracts included 7.3 million MMBtu of natural gas, that extended through December 2021, but these contracts were settled during the first quarter of 2021, primarily due to the weather event discussed in Note 8. At December 31, 2022 and 2021, we had no outstanding natural gas contracts. For 2021, we recognized a gain of $2.7 million (including a realized gain of $1.5 million). For 2020, we recognized a $1.6 million loss (none for 2022), which amount included an unrealized loss of $1.2 million attributed to natural gas contracts still held at the reporting date. The gain is classified as a reduction of cost of sales and the loss is classified as cost of sales. Financial Instruments At December 31, 2022 and 2021, we did no t have any financial instruments with fair values materially different from their carrying amounts (which excludes issuance costs, if applicable) except for our Senior Secured Notes included in the table below. Fair value of our Senior Secured Notes is classified as a Level 2 fair value measurement. The fair value of financial instruments is not indicative of the overall fair value of our assets and liabilities since financial instruments do not include all assets, including intangibles and all liabilities.
|  | 2022 |  |  | 2021 |
|  | Carrying |  |  | Estimated |  |  | Carrying |  |  | Estimated |
|  | Amount |  |  | Fair Value |  |  | Amount |  |  | Fair Value |
|  | (In Millions) |
Senior Secured Notes (1) |  | $ | 700 |  |  | $ | 637 |  |  | $ | 500 |  |  | $ | 516 |
1. Based on a quoted price of 91.00 at December 31, 2022 and 103.25 at December 31, 2021.

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- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -URI https://asc.fasb.org/topic&trid=2229140 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126731327&loc=d3e90205-114008 + Details
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