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Non-Derivative Fair Value Measurements | 9 Months Ended
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Sep. 30, 2023
Fair Value Disclosures [Abstract] |
Non-Derivative Fair Value Measurements | Non-Derivative Fair Value Measurements Non-derivative fair value measurements consist of NEP's cash equivalents. The fair value of these financial assets is determined using the valuation techniques and inputs as described in Note 3 – Fair Value Measurement of Derivative Instruments. The fair value of money market funds that are included in cash and cash equivalents, current other assets and noncurrent other assets on NEP's condensed consolidated balance sheets is estimated using a market approach based on current observable market prices. Recurring Non-Derivative Fair Value Measurements – NEP’s financial assets and liabilities and other fair value measurements made on a recurring basis by fair value hierarchy level are as follows:
| September 30, 2023 |  | December 31, 2022
| Level 1 |  | Level 2 |  | Total |  | Level 1 |  | Level 2 |  | Total
| (millions)
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash equivalents | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 5 |  |  | $ | — |  |  | $ | 5 |
Total assets | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 5 |  |  | $ | — |  |  | $ | 5 |
Financial Instruments Recorded at Other than Fair Value – The carrying amounts and estimated fair values of other financial instruments recorded at other than fair value are as follows:
| September 30, 2023 |  | December 31, 2022
| Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value
| (millions)
Long-term debt, including current maturities(a) | $ | 6,481 |  |  | $ | 6,171 |  |  | $ | 5,288 |  |  | $ | 5,105 |
____________________ (a) At September 30, 2023 and December 31, 2022, approximately $6,152 million and $5,086 million, respectively, of the fair value is estimated using a market approach based on quoted market prices for the same or similar issues (Level 2); the balance is estimated using an income approach utilizing a discounted cash flow valuation technique, considering the current credit profile of the debtor (Level 3). At September 30, 2023 and December 31, 2022, approximately $1,391 million and $1,510 million, respectively, of the fair value relates to the 2020 convertible notes, the 2021 convertible notes and the 2022 convertible notes and is estimated using Level 2 inputs.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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