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v3.24.3

Summary of Significant Accounting Policies - Capitalized Contract Costs (Details) | 9 Months Ended
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Sep. 30, 2024
Accounting Policies [Abstract] |
Contract with customer, term | 5 years

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- Definition Contract With Customer, Term + References No definition available. + Details
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Namespace Prefix: | nrg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration