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Earnings /Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Reconciliation of NRG's basic and diluted earnings per share

The reconciliation of NRG's basic income/(loss) per share to diluted income/(loss) per share is shown in the following table:

			Year Ended December 31,
(In millions, except per share amounts)			2019						2018						2017
Basic income/(loss) per share attributable to NRG, Inc;
Net income/(loss) attributable to NRG Energy, Inc. common stockholders			$	4,438					$	268					$	(2,153)
Weighted average number of common shares outstanding-basic			262						304						317
Income/(Loss) per weighted average common share — basic			$	16.94					$	0.88					$	(6.79)
Diluted income/(loss) per share attributable to NRG, Inc;
Net income/(loss) attributable to NRG Energy, Inc. common stockholders			$	4,438					$	268					$	(2,153)
Weighted average number of common shares outstanding-basic			262						304						317
Incremental shares attributable to the issuance of equity compensation (treasury stock method)			2						4						—
Weighted average number of common shares outstanding-diluted			264						308						317
Income/(Loss) per weighted average common share — diluted			$	16.81					$	0.87					$	(6.79)

Summary of NRG's outstanding equity instruments that are anti-dilutive and were not included in the computation of the Company's diluted earnings per share

The following table summarizes NRG's outstanding equity instruments that are anti-dilutive and were not included in the computation of the Company's diluted income/(loss) per share:

			Year Ended December 31,
(In millions)			2019						2018						2017
Equity compensation plans			—						—						5

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- References

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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