CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 255	$ 4,231
Investment in marketable securities	623	540
Accounts receivable, less bad debt reserve	1,415	1,190
Accrued unbilled revenues	451	378
Natural gas inventory	115	194
Materials and supplies	256	200
Non-trading derivative assets	63	100
Prepaid expenses and other current assets	241	192
Total current assets	3,419	7,025
Property, Plant and Equipment:
Property, plant and equipment	29,011	20,267
Less: accumulated depreciation and amortization	9,499	6,223
Property, plant and equipment, net	19,512	14,044
Other Assets:
Goodwill	5,129	867
Regulatory assets	2,229	1,967
Non-trading derivative assets	33	38
Investment in unconsolidated affiliates	2,471	2,482
Preferred units – unconsolidated affiliate	363	363
Intangibles	460	65
Other	286	158
Total other assets	10,971	5,940
Total Assets	33,902	27,009
Current Liabilities:
Current portion of VIE Securitization Bonds long-term debt	347	458
Indexed debt, net	23	24
Current portion of other long-term debt	32	0
Indexed debt securities derivative	687	601
Accounts payable	1,181	1,240
Taxes accrued	214	204
Interest accrued	127	121
Dividends accrued	0	187
Customer deposits	142	86
Non-trading derivative liabilities	48	126
Other	338	255
Total current liabilities	3,139	3,302
Other Liabilities:
Deferred income taxes, net	3,824	3,239
Non-trading derivative liabilities	18	5
Benefit obligations	888	796
Regulatory liabilities	3,449	2,525
Other	609	402
Total other liabilities	8,788	6,967
Long-term Debt:
VIE Securitization Bonds, net	914	977
Other long-term debt, net	12,845	7,705
Total long-term debt, net	13,759	8,682
Commitments and Contingencies (Note 14)
Shareholders’ Equity:
Cumulative preferred stock, $0.01 par value, 20,000,000 shares authorized
Common stock	5	5
Additional paid-in capital	6,060	6,072
Retained earnings	518	349
Accumulated other comprehensive income (loss)	(107)	(108)
Total shareholders’ equity	8,216	8,058
Total Liabilities and Shareholders’ Equity	33,902	27,009
Houston Electric [Member]
Current Assets:
Cash and cash equivalents	243	335
Accounts and notes receivable, less bad debt reserve	286	283
Accounts and notes receivable–affiliated companies	991	20
Accrued unbilled revenues	86	110
Materials and supplies	134	135
Taxes receivable	0	5
Prepaid expenses and other current assets	46	61
Total current assets	1,786	949
Property, Plant and Equipment:
Property, plant and equipment	12,287	12,148
Less: accumulated depreciation and amortization	3,743	3,746
Property, plant and equipment, net	8,544	8,402
Other Assets:
Regulatory assets	1,056	1,124
Other	34	32
Total other assets	1,090	1,156
Total Assets	11,420	10,507
Current Liabilities:
Current portion of VIE Securitization Bonds long-term debt	347	458
Accounts payable	238	262
Accounts and notes payable–affiliated companies	37	78
Taxes accrued	65	115
Interest accrued	56	64
Non-trading derivative liabilities	0	24
Other	76	89
Total current liabilities	819	1,090
Other Liabilities:
Deferred income taxes, net	1,015	1,023
Benefit obligations	88	91
Regulatory liabilities	1,272	1,298
Other	68	65
Total other liabilities	2,443	2,477
Long-term Debt:
VIE Securitization Bonds, net	914	977
Other long-term debt, net	3,970	3,281
Total long-term debt, net	4,884	4,258
Commitments and Contingencies (Note 14)
Shareholders’ Equity:
Common stock	0	0
Additional paid-in capital	2,486	1,896
Retained earnings	803	800
Accumulated other comprehensive income (loss)	(15)	(14)
Total shareholders’ equity	3,274	2,682
Total Liabilities and Shareholders’ Equity	11,420	10,507
CERC Corp [Member]
Current Assets:
Cash and cash equivalents	1	14
Accounts receivable, less bad debt reserve	856	894
Accounts and notes receivable–affiliated companies	232	120
Accrued unbilled revenues	191	268
Natural gas inventory	72	194
Materials and supplies	67	65
Non-trading derivative assets	63	100
Prepaid expenses and other current assets	65	115
Total current assets	1,547	1,770
Property, Plant and Equipment:
Property, plant and equipment	7,533	7,431
Less: accumulated depreciation and amortization	2,260	2,205
Property, plant and equipment, net	5,273	5,226
Other Assets:
Goodwill	867	867
Regulatory assets	180	181
Non-trading derivative assets	33	38
Other	165	132
Total other assets	1,245	1,218
Total Assets	8,065	8,214
Current Liabilities:
Accounts payable	570	856
Accounts and notes payable–affiliated companies	38	50
Taxes accrued	81	82
Interest accrued	31	38
Customer deposits	76	75
Non-trading derivative liabilities	47	102
Other	136	137
Total current liabilities	979	1,340
Other Liabilities:
Deferred income taxes, net	443	406
Non-trading derivative liabilities	9	5
Benefit obligations	94	93
Regulatory liabilities	1,233	1,227
Other	362	329
Total other liabilities	2,141	2,060
Long-term Debt:
Total long-term debt, net	2,384	2,371
Commitments and Contingencies (Note 14)
Shareholders’ Equity:
Common stock	0	0
Additional paid-in capital	2,015	2,015
Retained earnings	541	423
Accumulated other comprehensive income (loss)	5	5
Total shareholders’ equity	2,561	2,443
Total Liabilities and Shareholders’ Equity	8,065	8,214
Series A Preferred Stock [Member]
Shareholders’ Equity:
Preferred Stock, $0.01 par value	790	790
Series B Preferred Stock [Member]
Shareholders’ Equity:
Preferred Stock, $0.01 par value	$ 950	$ 950