CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 10	$ 2
Accounts receivable, less bad debt reserve of $30 and $23, respectively	638	595
Accrued unbilled revenue	152	262
Accounts and notes receivable — affiliated companies	16	18
Materials and supplies	43	41
Natural gas inventory	37	211
Non-trading derivative assets	82	99
Deferred income tax assets	4	1
Prepaid expenses and other current assets	59	90
Total current assets	1,041	1,319
Property, Plant and Equipment:
Property, plant and equipment	5,454	5,364
Less: accumulated depreciation and amortization	1,599	1,554
Property, plant and equipment, net	3,855	3,810
Other Assets:
Goodwill	840	840
Non-trading derivative assets	35	32
Investment in unconsolidated affiliates	4,501	4,521
Notes receivable from unconsolidated affiliates	363	363
Other	148	160
Total other assets	5,887	5,916
Total Assets	10,783	11,045
Current Liabilities:
Short-term borrowings	0	53
Accounts payable	344	528
Accounts and notes payable — affiliated companies	38	228
Taxes accrued	65	67
Interest accrued	39	36
Customer deposits	81	80
Derivative Liability, Current	9	19
Other	170	137
Total current liabilities	746	1,148
Other Liabilities:
Deferred Tax Liabilities, Net, Noncurrent	2,319	2,252
Non-trading derivative liabilities	2	1
Benefit obligations	110	111
Regulatory liabilities	692	669
Other	195	194
Total other liabilities	3,318	3,227
Long-Term Debt	2,409	2,469
Commitments and Contingencies (Note 10)
Stockholder’s Equity:
Common stock	0	0
Paid-in capital	2,417	2,417
Retained earnings	1,892	1,783
Accumulated other comprehensive income	1	1
Total stockholder’s equity	4,310	4,201
Total Liabilities and Stockholder’s Equity	$ 10,783	$ 11,045