CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 271	$ 4,231
Investment in marketable securities	687	540
Accounts receivable, less bad debt reserve	1,173	1,190
Accrued unbilled revenues	365	378
Natural gas inventory	212	194
Materials and supplies	267	200
Non-trading derivative assets	101	100
Taxes receivable	69	0
Prepaid expenses and other current assets	181	192
Total current assets	3,326	7,025
Property, Plant and Equipment:
Property, plant and equipment	29,552	20,267
Less: accumulated depreciation and amortization	9,620	6,223
Property, plant and equipment, net	19,932	14,044
Other Assets:
Goodwill	5,179	867
Regulatory assets	2,228	1,967
Notes receivable – unconsolidated affiliate	4	0
Non-trading derivative assets	44	38
Investment in unconsolidated affiliates	2,470	2,482
Preferred units – unconsolidated affiliate	363	363
Intangible assets, net	370	65
Other	273	158
Total other assets	10,931	5,940
Total Assets	34,189	27,009
Current Liabilities:
Current portion of VIE Securitization Bonds long-term debt	349	458
Indexed debt, net	22	24
Current portion of other long-term debt	117	0
Indexed debt securities derivative	755	601
Accounts payable	936	1,240
Taxes accrued	158	204
Interest accrued	157	121
Dividends accrued	0	187
Customer deposits	126	86
Non-trading derivative liabilities	33	126
Other	343	255
Total current liabilities	2,996	3,302
Other Liabilities:
Deferred income taxes, net	3,805	3,239
Non-trading derivative liabilities	18	5
Benefit obligations	872	796
Regulatory liabilities	3,467	2,525
Other	653	402
Total other liabilities	8,815	6,967
Long-term Debt:
VIE Securitization Bonds, net	845	977
Other long-term debt, net	13,276	7,705
Total long-term debt, net	14,121	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	6,065	6,072
Retained earnings	552	349
Accumulated other comprehensive income (loss)	(105)	(108)
Total shareholders’ equity	8,257	8,058
Total Liabilities and Shareholders’ Equity	34,189	27,009
Houston Electric [Member]
Current Assets:
Cash and cash equivalents	260	335
Accounts and notes receivable, less bad debt reserve	327	283
Accounts and notes receivable–affiliated companies	831	20
Accrued unbilled revenues	122	110
Materials and supplies	142	135
Taxes receivable	13	5
Prepaid expenses and other current assets	41	61
Total current assets	1,736	949
Property, Plant and Equipment:
Property, plant and equipment	12,457	12,148
Less: accumulated depreciation and amortization	3,762	3,746
Property, plant and equipment, net	8,695	8,402
Other Assets:
Regulatory assets	1,016	1,124
Other	31	32
Total other assets	1,047	1,156
Total Assets	11,478	10,507
Current Liabilities:
Current portion of VIE Securitization Bonds long-term debt	349	458
Accounts payable	226	262
Accounts and notes payable–affiliated companies	59	78
Taxes accrued	63	115
Interest accrued	82	64
Non-trading derivative liabilities	0	24
Other	73	89
Total current liabilities	852	1,090
Other Liabilities:
Deferred income taxes, net	1,010	1,023
Benefit obligations	87	91
Regulatory liabilities	1,286	1,298
Other	69	65
Total other liabilities	2,452	2,477
Long-term Debt:
VIE Securitization Bonds, net	845	977
Other long-term debt, net	3,971	3,281
Total long-term debt, net	4,816	4,258
Commitments and Contingencies (Note 14)
Shareholders’ Equity:
Common stock	0	0
Additional paid-in capital	2,486	1,896
Retained earnings	887	800
Accumulated other comprehensive income (loss)	(15)	(14)
Total shareholders’ equity	3,358	2,682
Total Liabilities and Shareholders’ Equity	11,478	10,507
CERC Corp [Member]
Current Assets:
Cash and cash equivalents	1	14
Accounts receivable, less bad debt reserve	506	894
Accounts and notes receivable–affiliated companies	192	120
Accrued unbilled revenues	90	268
Natural gas inventory	159	194
Materials and supplies	71	65
Non-trading derivative assets	101	100
Prepaid expenses and other current assets	39	115
Total current assets	1,159	1,770
Property, Plant and Equipment:
Property, plant and equipment	7,710	7,431
Less: accumulated depreciation and amortization	2,306	2,205
Property, plant and equipment, net	5,404	5,226
Other Assets:
Goodwill	867	867
Regulatory assets	187	181
Non-trading derivative assets	44	38
Other	154	132
Total other assets	1,252	1,218
Total Assets	7,815	8,214
Current Liabilities:
Accounts payable	406	856
Accounts and notes payable–affiliated companies	45	50
Taxes accrued	51	82
Interest accrued	38	38
Customer deposits	74	75
Non-trading derivative liabilities	28	102
Other	132	137
Total current liabilities	774	1,340
Other Liabilities:
Deferred income taxes, net	446	406
Non-trading derivative liabilities	7	5
Benefit obligations	94	93
Regulatory liabilities	1,234	1,227
Other	357	329
Total other liabilities	2,138	2,060
Long-term Debt:
Total long-term debt, net	2,397	2,371
Commitments and Contingencies (Note 14)
Shareholders’ Equity:
Common stock	0	0
Additional paid-in capital	2,015	2,015
Retained earnings	486	423
Accumulated other comprehensive income (loss)	5	5
Total shareholders’ equity	2,506	2,443
Total Liabilities and Shareholders’ Equity	7,815	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