CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 27	$ 12
Accounts receivable, less bad debt reserve of $22 and $18, respectively	780	713
Accrued unbilled revenues	179	307
Accounts and notes receivable–affiliated companies	8	6
Materials and supplies	61	56
Natural gas inventory	81	222
Non-trading derivative assets	84	110
Prepaid expenses and other current assets	94	166
Total current assets	1,314	1,592
Property, Plant and Equipment:
Property, plant and equipment	6,978	6,888
Less: accumulated depreciation and amortization	2,094	2,036
Property, plant and equipment, net	4,884	4,852
Other Assets:
Goodwill	867	867
Non-trading derivative assets	52	44
Investment in unconsolidated affiliate	2,467	2,472
Other	271	285
Total other assets	3,657	3,668
Total Assets	9,855	10,112
Current Liabilities:
Short-term borrowings	0	39
Accounts payable	479	669
Accounts and notes payable–affiliated companies	39	611
Taxes accrued	75	75
Interest accrued	19	32
Customer deposits	77	76
Non-trading derivative liabilities	21	20
Other	137	137
Total current liabilities	847	1,659
Other Liabilities:
Deferred income taxes, net	1,323	1,289
Non-trading derivative liabilities	12	4
Benefit obligations	97	97
Regulatory liabilities	1,240	1,201
Other	303	297
Total other liabilities	2,975	2,888
Long-Term Debt	2,882	2,457
Commitments and Contingencies (Note 12)
Stockholder’s Equity:
Common stock	0	0
Paid-in capital	2,527	2,528
Retained earnings	618	574
Accumulated other comprehensive income	6	6
Total stockholder’s equity	3,151	3,108
Total Liabilities and Stockholder’s Equity	$ 9,855	$ 10,112