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Acquisitions - Supplemental Unaudited Pro forma Results of Operations (Details) - June 2023 Acquisition - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Business Acquisition, Pro Forma Information [Abstract] |  |  |  |
Pro forma revenues | $ 367 | $ 324 | $ 1,059 | $ 1,010
Pro forma operating income | 73 | 59 | 159 | 249
Pro forma net income | 132 | 243 | 77 | 1,144
Pro forma net income attributable to NEP | $ 53 | $ 82 | $ 98 | $ 455

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- Definition Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
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