XML 136 R118.htm IDEA: XBRL DOCUMENT v3.22.4

Capital Structure - Common Stock (Details) - USD ($)		1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 20, 2023	Dec. 31, 2021	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity, Class of Treasury Stock [Line Items]
Quarterly dividends per share (usd per share)						$ 0.350	$ 0.325	$ 0.30
Dividends paid per share (in usd per share)						1.40	1.30	$ 1.20
Common stock, dividends, proposed annual amount, per share (usd per share)			$ 1.20			$ 1.40	$ 1.30		$ 0.12
Common stock, annual dividends increase, percentage						8.00%	8.00%
Eligible compensation withholding, minimum, percentage						1.00%
Eligible compensation withholding, maximum, percentage						10.00%
Market value on offering date percentage						95.00%
Exercise price as a percentage of fair value (as a percent)						95.00%
Treasury stock reserved for issuance under the ESPP (in shares)		2,493,374					2,493,374
Shares repurchased (in shares)						14,685,521	1,084,752	6,062,783
2021 Capital Allocation Plan
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount		$ 1,000,000,000					$ 1,000,000,000
Shares repurchased (in shares)		44,000,000				601,000,000
Stock repurchase program, remaining amount						$ 355,000,000
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Dividends per common share (in usd per share)	$ 0.3775
Scenario, Plan | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Common stock, dividends, proposed annual amount, per share (usd per share)	$ 1.51				$ 1.51
Common stock, annual dividends increase, percentage					8.00%
Scenario, Plan | Subsequent Event | 2023 Capital Allocation Plan
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount					$ 600,000,000
Capital allocation plan, return of cash available to shareholders, percentage					50.00%
Minimum
Equity, Class of Treasury Stock [Line Items]
Annual dividend growth rate, percentage				700.00%
Maximum
Equity, Class of Treasury Stock [Line Items]
Annual dividend growth rate, percentage				9.00%
Long-term incentive plans
Equity, Class of Treasury Stock [Line Items]
Long-term incentive plans (in shares)						14,022,916

X

- Definition

Capital Allocation Plan, Return Of Cash Available For Allocation To Shareholders, Percentage

+ References

No definition available.

+ Details

Name:	nrg_CapitalAllocationPlanReturnOfCashAvailableForAllocationToShareholdersPercentage
Namespace Prefix:	nrg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Common Stock, Annual Dividend Growth Rate

+ References

No definition available.

+ Details

Name:	nrg_CommonStockAnnualDividendGrowthRate
Namespace Prefix:	nrg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Common Stock, Annual Dividends Increase (Decrease), Percentage

+ References

No definition available.

+ Details

Name:	nrg_CommonStockAnnualDividendsIncreaseDecreasePercentage
Namespace Prefix:	nrg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate number of common shares reserved for employee stock purchase plan.

+ References

No definition available.

+ Details

Name:	nrg_CommonStockCapitalSharesReservedForEmployeeStockPurchasePlan
Namespace Prefix:	nrg_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Common Stock, Dividends, Proposed Annual Amount, Per Share

+ References

No definition available.

+ Details

Name:	nrg_CommonStockDividendsProposedAnnualAmountPerShare
Namespace Prefix:	nrg_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Common Stock, Quarterly Dividends, Per Share, Cash Paid

+ References

No definition available.

+ Details

Name:	nrg_CommonStockQuarterlyDividendsPerShareCashPaid
Namespace Prefix:	nrg_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This element represents the exercise price under employee stock purchase plan as a percentage of fair value.

+ References

No definition available.

+ Details

Name:	nrg_EmployeeStockPurchasePlanExercisePriceAsPercentageOfFairValue
Namespace Prefix:	nrg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This element represents the maximum percentage of eligible compensation, which can be withheld by employees to purchase shares of the entity.

+ References

No definition available.

+ Details

Name:	nrg_EmployeeStockPurchasePlanMaximumPercentageOfCompensationEligible
Namespace Prefix:	nrg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Employee Stock Purchase Plan, Minimum Percentage of Compensation Eligible

+ References

No definition available.

+ Details

Name:	nrg_EmployeeStockPurchasePlanMinimumPercentageofCompensationEligible
Namespace Prefix:	nrg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate number of common shares reserved for future issuance.

+ 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 210.5-02.29)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: 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 https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareCashPaid
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: 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 https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

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_EquityClassOfTreasuryStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Discount rate from fair value on purchase date that participants pay for shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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 https://asc.fasb.org/extlink&oid=126973232&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 https://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 https://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 https://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

- Details

Name:	nrg_CapitalAllocationPlanAxis=nrg_A2021CapitalAllocationPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	srt_StatementScenarioAxis=us-gaap_ScenarioPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	nrg_CapitalAllocationPlanAxis=nrg_A2023CapitalAllocationPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_StockCompensationPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: