CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 18	$ 1
Accounts receivable, less bad debt reserve of $32 and $25, respectively	862	565
Accrued unbilled revenue	269	311
Accounts and notes receivable — affiliated companies	63	44
Materials and supplies	37	34
Natural gas inventory	26	145
Non-trading derivative assets	24	24
Taxes receivable	0	18
Deferred income tax assets	13	21
Prepaid expenses and other current assets	89	51
Total current assets	1,401	1,214
Property, Plant and Equipment:
Property, plant and equipment	4,901	4,815
Less: accumulated depreciation and amortization	1,418	1,379
Property, plant and equipment, net	3,483	3,436
Other Assets:
Goodwill	840	840
Non-trading derivative assets	9	10
Investment in unconsolidated affiliates	4,540	4,518
Notes receivable from unconsolidated affiliates	363	363
Other	144	161
Total other assets	5,896	5,892
Total Assets	10,780	10,542
Current Liabilities:
Short-term borrowings	0	43
Accounts payable	631	495
Accounts and notes payable — affiliated companies	85	103
Taxes accrued	80	74
Interest accrued	39	36
Customer deposits	79	78
Non-trading derivative liabilities	17	17
Other	174	163
Total current liabilities	1,105	1,009
Other Liabilities:
Deferred Tax Liabilities, Net, Noncurrent	2,164	2,082
Non-trading derivative liabilities	2	4
Benefit obligations	102	102
Regulatory liabilities	670	642
Other	157	160
Total other liabilities	3,095	2,990
Long-Term Debt	2,124	2,240
Commitments and Contingencies (Note 10)
Stockholder’s Equity:
Common stock	0	0
Paid-in capital	2,417	2,416
Retained earnings	2,034	1,882
Accumulated other comprehensive income	5	5
Total stockholder’s equity	4,456	4,303
Total Liabilities and Stockholder’s Equity	$ 10,780	$ 10,542