CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 1	$ 1
Accounts receivable, less bad debt reserve of $18 and $14, respectively	482	512
Accrued unbilled revenues	76	229
Accounts and notes receivable–affiliated companies	5	5
Materials and supplies	56	47
Natural gas inventory	218	131
Non-trading derivative assets	67	51
Prepaid expenses and other current assets	90	81
Total current assets	995	1,057
Property, Plant and Equipment:
Property, plant and equipment	6,553	6,351
Less: accumulated depreciation and amortization	1,863	1,782
Property, plant and equipment, net	4,690	4,569
Other Assets:
Goodwill	867	862
Non-trading derivative assets	46	19
Investment in unconsolidated affiliate	2,487	2,505
Other	250	206
Total other assets	3,650	3,592
Total Assets	9,335	9,218
Current Liabilities:
Short-term borrowings	24	35
Current portion of long-term debt	550	250
Accounts payable	390	471
Accounts and notes payable–affiliated companies	39	40
Taxes accrued	47	73
Interest accrued	32	33
Customer deposits	78	80
Non-trading derivative liabilities	20	41
Other	86	124
Total current liabilities	1,266	1,147
Other Liabilities:
Deferred income taxes, net	2,041	1,925
Non-trading derivative liabilities	4	5
Benefit obligations	105	104
Regulatory liabilities	795	769
Other	232	221
Total other liabilities	3,177	3,024
Long-Term Debt	1,978	2,125
Commitments and Contingencies (Note 11)
Stockholder’s Equity:
Common stock	0	0
Paid-in capital	2,528	2,489
Retained earnings	383	430
Accumulated other comprehensive income	3	3
Total stockholder’s equity	2,914	2,922
Total Liabilities and Stockholder’s Equity	$ 9,335	$ 9,218