XML 82 R70.htm IDEA: XBRL DOCUMENT
v3.22.1

Changes in Capital Structure - Schedule of Repurchases Under Share Repurchase Programs (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
Schedule of Capitalization, Equity [Line Items] |  |  |
Total number of shares purchased (in shares) |  | 4,830,389 |
Accrued stock repurchases |  | $ 10 |
Subsequent Event |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Total number of shares purchased (in shares) | 2,014,734 |  |
Capital Allocation Plan, Open Market Repurchases |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Total number of shares purchased (in shares) |  | 4,830,389 |
Average price paid per share (in usd per share) |  | $ 38.66 |
Amounts paid for shares and share equivalents purchased |  | $ 187 |
Capital Allocation Plan, Open Market Repurchases | Subsequent Event |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Total number of shares purchased (in shares) | 2,014,734 |  |
Amounts paid for shares and share equivalents purchased | $ 76 |  |
Equivalent Shares in Lieu of Tax Withholding on Equity Compensation Issuances |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Total number of shares purchased (in shares) |  | 131,899 |
Average price paid per share (in usd per share) |  | $ 43.03 |
Amounts paid for shares and share equivalents purchased |  | $ 6 |
Equivalent Shares in Lieu of Tax Withholding on Equity Compensation Issuances | Subsequent Event |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Total number of shares purchased (in shares) | 5,465 |  |
Average price paid per share (in usd per share) | $ 39.19 |  |
Amounts paid for shares and share equivalents purchased | $ 0 |  |
Capital Allocation Plan |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Total number of shares purchased (in shares) |  | 4,962,288 |
Average price paid per share (in usd per share) |  | $ 38.78 |
Amounts paid for shares and share equivalents purchased |  | $ 193 | $ 44
Capital Allocation Plan | Subsequent Event |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Total number of shares purchased (in shares) | 6,982,487 |  |
Average price paid per share (in usd per share) | $ 38.55 |  |
Amounts paid for shares and share equivalents purchased | $ 269 |  |

X
- Definition Accrued Liabilities, Stock Repurchases + References No definition available. + Details
Name: | nrg_AccruedLiabilitiesStockRepurchases
Namespace Prefix: | nrg_
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
Name: | us-gaap_ScheduleOfCapitalizationEquityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockRepurchasedDuringPeriodValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nrg_CapitalAllocationPlanAxis=nrg_CapitalAllocationPlanOpenMarketRepurchasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nrg_CapitalAllocationPlanAxis=nrg_EquivalentSharesInLieuOfTaxWithholdingOnEquityCompensationIssuancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nrg_CapitalAllocationPlanAxis=nrg_CapitalAllocationPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |