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Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Segment Reporting

			For the Year Ended December 31, 2020
(In millions)			Texas						East						West/Other						Corporate(a)						Eliminations						Total
Operating revenues(a)			$	6,309					$	2,354					$	434					$	—					$	(4)					$	9,093
Operating expenses			5,246						1,828						346						57						(4)						7,473
Depreciation and amortization			227						142						32						34						—						435
Impairment losses			14						—						61						—						—						75
Development costs			4						3						1						—						—						8
Total operating cost and expenses			5,491						1,973						440						91						(4)						7,991
(Loss)/gain on sale of assets			—						—						(2)						5						—						3
Operating income/(loss)			818						381						(8)						(86)						—						1,105
Equity in (losses)/earnings of unconsolidated affiliates			(12)						—						29						—						—						17
Impairment losses on investments			(18)						—						—						—						—						(18)
Other income, net			11						7						8						41						—						67
Loss on debt extinguishment			—						(4)						(5)						—						—						(9)
Interest expense			—						(14)						(3)						(384)						—						(401)
Income/(loss) from continuing operations before income taxes			799						370						21						(429)						—						761
Income tax (benefit)/expense			—						(1)						2						250						—						251
Net income/(loss) attributable to NRG Energy, Inc.			$	799					$	371					$	19					$	(679)					$	—					$	510
Balance sheet
Equity investments in affiliates			$	(13)					$	—					$	359					$	—					$	—					$	346
Capital expenditures			130						45						30						25						—						230
Goodwill(b)			325						254						—						—						—						579
Total assets			$	7,641					$	1,885					$	1,584					$	11,152					$	(7,360)					$	14,902

(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues			$	6					$	(6)					$	4					$	—					$	—					$	4
(b) Goodwill was allocated based on the regions in which the business operates and are expected to benefit using a relative fair value approach

			For the Year Ended December 31, 2019
(In millions)			Texas						East						West/Other						Corporate(a)						Eliminations						Total
Operating revenues(a)			$	7,069					$	2,319					$	440					$	—					$	(7)					$	9,821
Operating expenses			5,818						1,895						397						50						(7)						8,153
Depreciation and amortization			188						121						33						31						—						373
Impairment losses			1						—						4						—						—						5
Development costs			3						3						1						—						—						7
Total operating cost and expenses			6,010						2,019						435						81						(7)						8,538
Gain on sale of assets			—						1						—						6						—						7
Operating income/(loss)			1,059						301						5						(75)						—						1,290
Equity in (losses)/earnings of unconsolidated affiliates			(4)						—						6						—						—						2
Impairment losses on investments			(103)						—						—						(5)						—						(108)
Other income, net			20						6						10						30						—						66
Loss on debt extinguishment			—						—						(3)						(48)						—						(51)
Interest expense			—						(18)						(10)						(385)						—						(413)
Income/(loss) from continuing operations before income taxes			972						289						8						(483)						—						786
Income tax expense/(benefit)			—						2						1						(3,337)						—						(3,334)
Net income from continuing operations			972						287						7						2,854						—						4,120
Gain from discontinued operations, net of income tax			—						—						—						321						—						321
Net Income			972						287						7						3,175						—						4,441
Less: Net income attributable to noncontrolling interests and redeemable noncontrolling interests			—						—						3						—						—						3
Net income attributable to NRG Energy, Inc.			$	972					$	287					$	4					$	3,175					$	—					$	4,438
Balance sheet
Equity investments in affiliates			$	6					$	—					$	382					$	—					$	—					$	388
Capital expenditures			136						30						25						37						—						228
Goodwill(b)			325						254						—						—						—						579
Total assets			$	5,711					$	2,160					$	1,190					$	8,342					$	(4,872)					$	12,531

(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues			$	1					$	8					$	(2)					$	—					$	—					$	7
(b) Goodwill was allocated based on the regions in which the business operates and are expected to benefit using a relative fair value approach

			For the Year Ended December 31, 2018
(In millions)			Texas						East						West/Other						Corporate(a)						Eliminations						Total
Operating revenues(a)			$	6,401					$	2,371					$	724					$	—					$	(18)					$	9,478
Operating expenses			5,399						2,024						467						125						(18)						7,997
Depreciation and amortization			156						105						127						33						—						421
Impairment losses			5						82						12						—						—						99
Development costs			3						3						3						2						—						11
Total operating cost and expenses			5,563						2,214						609						160						(18)						8,528
Gain/(loss) on sale of assets			4						—						(2)						30						—						32
Operating income/(loss)			842						157						113						(130)						—						982
Equity in (losses)/earnings of unconsolidated affiliates			(3)						—						13						(1)						—						9
Impairment losses on investments			(15)						—						—						—						—						(15)
Other income/(loss), net			13						2						4						(1)						—						18
Loss on debt extinguishment			—						—						—						(44)						—						(44)
Interest expense			—						(22)						(39)						(422)						—						(483)
Income/(loss) from continuing operations before income taxes			837						137						91						(598)						—						467
Income tax expense			—						1						—						6						—						7
Net income/(loss) from continuing operations			837						136						91						(604)						—						460
Loss from discontinued operations, net of income tax			—						—						—						(192)						—						(192)
Net Income/(loss)			837						136						91						(796)						—						268
Less: Net income/(loss) attributable to noncontrolling interests and redeemable noncontrolling interests			—						—						5						(5)						—						—
Net income/(loss) attributable to NRG Energy, Inc.			$	837					$	136					$	86					$	(791)					$	—					$	268

(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues			$	19					$	(5)					$	4					$	—					$	—					$	18
(b) Goodwill was allocated based on the regions in which the business operates and are expected to benefit using a relative fair value approach

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- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

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- References

No definition available.

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