CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 2	$ 1
Accounts receivable, less bad debt reserve of $19 and $14, respectively	616	512
Accrued unbilled revenues	137	229
Accounts and notes receivable–affiliated companies	6	5
Materials and supplies	48	47
Natural gas inventory	138	131
Non-trading derivative assets	64	51
Prepaid expenses and other current assets	102	81
Total current assets	1,113	1,057
Property, Plant and Equipment:
Property, plant and equipment	6,434	6,351
Less: accumulated depreciation and amortization	1,823	1,782
Property, plant and equipment, net	4,611	4,569
Other Assets:
Goodwill	867	862
Non-trading derivative assets	46	19
Investment in unconsolidated affiliate	2,502	2,505
Other	218	206
Total other assets	3,633	3,592
Total Assets	9,357	9,218
Current Liabilities:
Short-term borrowings	0	35
Current portion of long-term debt	250	250
Accounts payable	429	471
Accounts and notes payable–affiliated companies	88	40
Taxes accrued	71	73
Interest accrued	31	33
Customer deposits	80	80
Non-trading derivative liabilities	28	41
Other	82	124
Total current liabilities	1,059	1,147
Other Liabilities:
Deferred income taxes, net	2,014	1,925
Non-trading derivative liabilities	8	5
Benefit obligations	104	104
Regulatory liabilities	788	769
Other	227	221
Total other liabilities	3,141	3,024
Long-Term Debt	2,157	2,125
Commitments and Contingencies (Note 11)
Stockholder’s Equity:
Common stock	0	0
Paid-in capital	2,528	2,489
Retained earnings	469	430
Accumulated other comprehensive income	3	3
Total stockholder’s equity	3,000	2,922
Total Liabilities and Stockholder’s Equity	$ 9,357	$ 9,218