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Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Segment Reporting

			For the Year Ended December 31, 2019
(In millions)			Retail						Generation						Corporate(a)						Eliminations						Total
Operating revenues(a)			$	7,680					$	3,847					$	—					$	(1,706)					$	9,821
Operating expenses			7,031						2,777						50						(1,705)						8,153
Depreciation and amortization			157						185						31						—						373
Impairment losses			1						4						—						—						5
Development costs			—						7						—						—						7
Total operating cost and expenses			7,189						2,973						81						(1,705)						8,538
(Loss)/Gain on sale of assets			(1)						2						6						—						7
Operating income/(loss)			490						876						(75)						(1)						1,290
Equity in earnings of unconsolidated affiliates			—						2						—						—						2
Impairment losses on investments			—						(101)						(7)						—						(108)
Other income, net			2						32						32						—						66
Loss on debt extinguishment			—						(3)						(48)						—						(51)
Interest expense			(3)						(24)						(386)						—						(413)
Income/(loss) from continuing operations before income taxes			489						782						(484)						(1)						786
Income tax expense/(benefit)			2						2						(3,338)						—						(3,334)
Net income from continuing operations			487						780						2,854						(1)						4,120
Gain from discontinued operations, net of income tax			—						—						321						—						321
Net Income			487						780						3,175						(1)						4,441
Less: Net income attributable to noncontrolling interests and redeemable noncontrolling interests			3						—						—						—						3
Net income attributable to NRG Energy, Inc.			$	484					$	780					$	3,175					$	(1)					$	4,438
Balance sheet
Equity investments in affiliates			$	—					$	388					$	—					$	—					$	388
Capital expenditures			60						134						34						—						228
Goodwill			414						165						—						—						579
Total assets			$	3,573					$	5,467					$	8,531					$	(5,040)					$	12,531

(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues $ 10  $ 1,602  $ 94  $ —  $ 1,706 

			For the Year Ended December 31, 2018
(In millions)			Retail						Generation						Corporate(a)						Eliminations						Total
Operating revenues(a)			$	7,103					$	3,443					$	—					$	(1,068)					$	9,478
Operating expenses			5,919						3,021						126						(1,069)						7,997
Depreciation and amortization			116						272						33						—						421
Impairment losses			1						98						—						—						99
Development costs			1						9						2						(1)						11
Total operating cost and expenses			6,037						3,400						161						(1,070)						8,528
Gain on sale of assets			—						2						30						—						32
Operating income/(loss)			1,066						45						(131)						2						982
Equity in earnings of unconsolidated affiliates			—						10						4						(5)						9
Impairment losses on investments			—						(15)						—						—						(15)
Other income/(loss), net			—						20						(1)						(1)						18
Loss on debt extinguishment			—						—						(44)						—						(44)
Interest expense			(3)						(58)						(422)						—						(483)
Income/(loss) from continuing operations before income taxes			1,063						2						(594)						(4)						467
Income tax expense			1						—						6						—						7
Net income/(loss) from continuing operations			1,062						2						(600)						(4)						460
Loss from discontinued operations, net of income tax			—						—						(192)						—						(192)
Net Income/(loss)			1,062						2						(792)						(4)						268
Less: Net income/(loss) attributable to noncontrolling interests and redeemable noncontrolling interests			1						9						(5)						(5)						—
Net income/(loss) attributable to NRG Energy, Inc.			$	1,061					$	(7)					$	(787)					$	1					$	268
Balance sheet
Equity investments in affiliates			$	—					$	412					$	—					$	—					$	412
Capital expenditures			90						267						31						—						388
Goodwill			408						165						—						—						573
Total assets			$	3,291					$	5,735					$	7,006					$	(5,404)					$	10,628

(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues $ 9  $ 1,085  $ (26) $ —  $ 1,068 

			For the Year Ended December 31, 2017
(In millions)			Retail						Generation						Corporate(a)						Eliminations						Total
Operating revenues(a)			$	6,369					$	3,615					$	13					$	(923)					$	9,074
Operating expenses			5,377						3,071						243						(925)						7,766
Depreciation and amortization			110						454						35						(3)						596
Impairment losses			8						1,526						—						—						1,534
Development costs			3						13						6						—						22
Total operating costs and expenses			5,498						5,064						284						(928)						9,918
Other income - affiliate			—						—						87						—						87
Gain on sale of assets			—						15						1						—						16
Operating income/(loss)			871						(1,434)						(183)						5						(741)
Equity in (losses)/earnings of unconsolidated affiliates			—						(14)						5						(5)						(14)
Impairment losses on investments			—						(75)						(4)						—						(79)
Other income, net			—						23						28						—						51
Loss on debt extinguishment			—						—						(49)						—						(49)
Interest expense			(6)						(100)						(451)						—						(557)
Income/(loss) from continuing operations before income taxes			865						(1,600)						(654)						—						(1,389)
Income tax (benefit)/expense			(8)						2						(38)						—						(44)
Net income/(loss) from continuing operations			873						(1,602)						(616)						—						(1,345)
Loss from discontinued operations, net of income tax			—						—						(992)						—						(992)
Net Income/(loss)			873						(1,602)						(1,608)						—						(2,337)
Less: Net income/(loss) attributable to noncontrolling interests and redeemable noncontrolling interests			1						4						(189)						—						(184)
Net income/(loss) attributable to NRG Energy, Inc.			$	872					$	(1,606)					$	(1,419)					$	—					$	(2,153)

(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues $ 4  $ 877  $ 42  $ —  $ 923 

X

- 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=115929826&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=115929826&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=108376223&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 21
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599

Reference 5: 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=115929826&loc=d3e8906-108599

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- References

No definition available.

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