CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating Revenues
Total operating revenues	$ 2,465	$ 2,461	$ 4,630	$ 4,526
Operating Costs and Expenses
Cost of operations	1,845	1,889	3,496	3,274
Depreciation and amortization	85	112	170	232
Impairment losses	1	74	1	74
Selling, general and administrative	211	200	405	376
Reorganization costs	2	23	15	43
Development costs	2	3	4	8
Total operating costs and expenses	2,146	2,301	4,091	4,007
Gain on sale of assets	1	14	2	16
Operating Income/(Loss)	320	174	541	535
Other Income/(Expense)
Equity in earnings/(losses) of unconsolidated affiliates	0	5	(21)	6
Other income/(expense), net	20	(23)	32	(23)
Loss on debt extinguishment, net	(47)	(1)	(47)	(3)
Interest expense	(105)	(123)	(219)	(239)
Total other income/(expense)	(132)	(142)	(255)	(259)
Income from Continuing Operations Before Income Taxes	188	32	286	276
Income tax expense/(benefit)	(1)	5	3	11
Income from Continuing Operations	189	27	283	265
Income/(loss) from discontinued operations	13	69	401	64
Net (loss)/income	202	96	684	329
Less: Net income/(loss) attributable to noncontrolling interest and redeemable interests	1	24	1	(22)
Net income attributable to NRG Energy, Inc.	$ 201	$ 72	$ 683	$ 351
Earnings per Share Attributable to NRG Energy, Inc.
Weighted average number of common shares outstanding — basic (in shares)	265	310	272	314
Income from continuing operations per weighted average common share — basic (in usd per share)	$ 0.71	$ 0.01	$ 1.04	$ 0.92
Income/(loss) from discontinued operations per weighted average common share — basic (in usd per share))	0.05	0.22	1.47	0.20
Earnings per Weighted Average Common Share — Basic (in usd per share)	$ 0.76	$ 0.23	$ 2.51	$ 1.12
Weighted average number of common shares outstanding — diluted (in shares)	267	314	274	318
Income from continuing operations per weighted average common share — diluted (in usd per share)	$ 0.70	$ 0.01	$ 1.03	$ 0.90
income from discontinued operations per weighted average common share — diluted (in usd per share)	0.05	0.22	1.46	0.20
Earnings per Weighted Average Common Share — Diluted (in usd per share)	0.75	0.23	2.49	1.10
Dividends Per Common Share (in usd per share)	$ 0.03	$ 0.03	$ 0.06	$ 0.06