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Derivatives, Hedges and Financial Instruments | 3 Months Ended
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Mar. 31, 2023
Derivative Instruments And Hedging Activities Disclosure [Abstract] |
Derivatives, Hedges and Financial Instruments | 6. Derivatives, Hedges and Financial Instruments Natural Gas Contracts Periodically, we entered into certain forward natural gas contracts, which are accounted for on a mark-to-market basis. We are utilizing these natural gas contracts as economic hedges for risk management purposes but are not designated as hedging instruments. At March 31, 2023 and December 31, 2022, we had no outstanding natural gas contracts accounted for on a mark-to-market basis. When present the valuations of the natural gas contracts are classified as Level 2. Financial Instruments At March 31, 2023 and December 31, 2022, 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. The carrying value of our Senior Secured Notes approximates fair value and 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.
|  | March 31, 2023 |  |  | December 31, 2022 |
|  | Carrying |  |  | Estimated |  |  | Carrying |  |  | Estimated |
|  | Amount |  |  | Fair Value |  |  | Amount |  |  | Fair Value |
|  | (In Millions) |
Senior Secured Notes (1) |  | $ | 700 |  |  | $ | 618 |  |  | $ | 700 |  |  | $ | 637 |
1. Based on a quoted pric e of 88.25 at Ma rch 31, 2023 and 91.00 at December 31, 2022.

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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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