CONDENSED STATEMENTS OF CONSOLIDATED INCOME (Unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Utility revenues		$ 1,539	$ 1,299	$ 5,255	$ 4,534
Non-utility revenues		1,203	913	3,816	3,019
Total		2,742	2,212	9,071	7,553
Expenses:
Utility natural gas, fuel and purchased power		179	134	1,178	959
Non-utility cost of revenues, including natural gas	[1]	852	864	3,013	2,927
Operation and maintenance		871	567	2,616	1,714
Depreciation and amortization		334	326	987	982
Taxes other than income taxes		114	95	353	307
Total		2,350	1,986	8,147	6,889
Operating Income (Loss)		392	226	924	664
Other Income (Expense):
Gain on marketable securities		59	43	206	66
Loss on indexed debt securities		(62)	(44)	(216)	(316)
Interest and other finance charges		(134)	(90)	(389)	(259)
Interest on Securitization Bonds		(9)	(16)	(31)	(46)
Equity in earnings of unconsolidated affiliates, net		77	81	213	208
Other income (expense), net		9	9	40	16
Total		(60)	(17)	(177)	(331)
Income (Loss) Before Income Taxes		332	209	747	333
Income tax expense (benefit)		62	51	113	85
Net Income		270	158	634	248
Preferred stock dividend requirement		29	5	88	5
Income Available to Common Shareholders		$ 241	$ 153	$ 546	$ 243
Basic Earnings Per Common Share		$ 0.48	$ 0.35	$ 1.09	$ 0.56
Diluted Earnings Per Common Share		$ 0.47	$ 0.35	$ 1.08	$ 0.56
Weighted Average Common Shares Outstanding, Basic		502,228,000	431,554,000	501,986,000	431,437,000
Weighted Average Common Shares Outstanding, Diluted		505,080,000	434,891,000	504,838,000	434,774,000
Houston Electric [Member]
Revenues:
Total		$ 859	$ 897	$ 2,310	$ 2,506
Expenses:
Operation and maintenance		359	369	1,086	1,062
Depreciation and amortization		168	242	519	737
Taxes other than income taxes		63	59	186	180
Total		590	670	1,791	1,979
Operating Income (Loss)		269	227	519	527
Other Income (Expense):
Interest and other finance charges		(41)	(32)	(123)	(101)
Interest on Securitization Bonds		(9)	(16)	(31)	(46)
Other income (expense), net		7	0	17	(6)
Total		(43)	(48)	(137)	(153)
Income (Loss) Before Income Taxes		226	179	382	374
Income tax expense (benefit)		41	36	70	78
Net Income		185	143	312	296
CERC Corp [Member]
Revenues:
Utility revenues		389	402	2,077	2,032
Non-utility revenues		737	910	2,759	3,008
Total		1,126	1,312	4,836	5,040
Expenses:
Utility natural gas, fuel and purchased power		113	134	928	959
Non-utility cost of revenues, including natural gas	[1]	687	864	2,627	2,927
Operation and maintenance		195	211	656	666
Depreciation and amortization		75	77	228	222
Taxes other than income taxes		33	33	120	120
Total		1,103	1,319	4,559	4,894
Operating Income (Loss)		23	(7)	277	146
Other Income (Expense):
Interest and other finance charges		(28)	(30)	(87)	(92)
Other income (expense), net		(3)	0	(6)	(5)
Total		(31)	(30)	(93)	(97)
Income (Loss) Before Income Taxes		(8)	(37)	184	49
Income tax expense (benefit)		(1)	(2)	25	14
Income (Loss) From Continuing Operations		(7)	(35)	159	35
Income from discontinued operations (net of tax of $-0-, $13, $-0- and $44, respectively)		0	44	0	140
Net Income		$ (7)	$ 9	$ 159	$ 175

[1] Income statement impact associated with cash flow hedge activity is related to gains and losses reclassified from Accumulated other comprehensive income into income. Amounts are immaterial for each Registrant in the three and nine months ended September 30, 2019 and 2018, respectively.