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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Reconciliation of NRG's basic and diluted earnings per share

The reconciliation of NRG's basic and diluted income per share is shown in the following table:

	Three months ended June 30,								Six months ended June 30,
In millions, except per share data	2019				2018				2019				2018
Basic income per share attributable to NRG Energy, Inc;
Net income attributable to NRG Energy, Inc. common stockholders	$	201			$	72			$	683			$	351
Weighted average number of common shares outstanding - basic	265				310				272				314
Income per weighted average common share — basic	$	0.76			$	0.23			$	2.51			$	1.12
Diluted income per share attributable to NRG Energy, Inc;
Net income attributable to NRG Energy, Inc. available to common shareholders	$	201			$	72			$	683			351
Weighted average number of common shares outstanding - basic	265				310				272				314
Incremental shares attributable to the issuance of equity compensation (treasury stock method)	2				4				2				4
Weighted average number of common shares outstanding - dilutive	267				314				274				318
Income per weighted average common share — diluted	$	0.75			$	0.23			$	2.49			$	1.10

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 per share:

	Three months ended June 30,						Six months ended June 30,
In millions of shares	2019			2018			2019			2018
Equity compensation plans	—			—			—			1

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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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