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Guarantees - Schedule of Maximum Potential Exposure (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Guarantor Obligations |  |
Under 1 Year | $ 5,481 |
1-3 Years | 25 |
3-5 Years | 34 |
Over 5 Years | 95 |
Guarantees by Remaining Maturity, Total | 5,635 | $ 4,602
Letters of credit and surety bonds |  |
Guarantor Obligations |  |
Under 1 Year | 5,211 |
1-3 Years | 0 |
3-5 Years | 0 |
Over 5 Years | 0 |
Guarantees by Remaining Maturity, Total | 5,211 | 4,095
Asset sales guarantee obligations |  |
Guarantor Obligations |  |
Under 1 Year | 270 |
1-3 Years | 25 |
3-5 Years | 34 |
Over 5 Years | 80 |
Guarantees by Remaining Maturity, Total | 409 | 414
Other guarantees |  |
Guarantor Obligations |  |
Under 1 Year | 0 |
1-3 Years | 0 |
3-5 Years | 0 |
Over 5 Years | 15 |
Guarantees by Remaining Maturity, Total | $ 15 | $ 93

X
- Definition Maximum potential amount of future payments that the guarantor could be required to make between one to three years of the balance sheet date under the guarantee. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

X
- Definition Maximum potential amount of future payments that the guarantor could be required to make between three to five years of the balance sheet date under the guarantee. + References No definition available. + Details
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Namespace Prefix: | nrg_
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X
- Definition Maximum potential amount of future payments that the guarantor could be required to make after five years of the balance sheet date under the guarantee. + References No definition available. + Details
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Namespace Prefix: | nrg_
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X
- Definition Maximum potential amount of future payments that the guarantor could be required to make within one year of the balance sheet date under the guarantee. + References No definition available. + Details
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X
- Definition The estimated amount of future payments the guarantor could be required to make under guarantees, indemnities and other contingent liability obligations. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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X
- Details
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Namespace Prefix: |
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X
- Details
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Namespace Prefix: |
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- Details
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