CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents ($264 and $290 related to VIEs, respectively)	$ 264	$ 290
Accounts and notes receivable, net ($64 and $58 related to VIEs, respectively), less bad debt reserve of $1 and $3, respectively	234	237
Accounts and notes receivable—affiliated companies	16	119
Accrued unbilled revenues	96	96
Inventory	133	126
Taxes receivable	59	103
Other ($35 and $47 related to VIEs, respectively)	63	74
Total current assets	865	1,045
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, net	6,933	6,343
Other Assets:
Regulatory assets ($2,373 and $2,738 related to VIEs, respectively)	2,211	2,629
Other	37	34
Total other assets	2,248	2,663
Total Assets	10,046	10,051
Current Liabilities:
Current portion of VIE transition and system restoration bonds long-term debt	391	372
Accounts payable	153	148
Accounts and notes payable—affiliated companies	348	121
Taxes accrued	100	104
Interest accrued	70	75
Other	69	109
Total current liabilities	1,131	929
Other Liabilities:
Deferred income taxes, net	2,032	1,999
Benefit obligations	192	260
Regulatory liabilities	542	537
Other	59	54
Total other liabilities	2,825	2,850
Long-Term Debt:
VIE transition and system restoration bonds	2,283	2,674
Other long-term debt	2,206	2,006
Total long-term debt	$ 4,489	$ 4,680
Commitments and Contingencies (Note 10)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Member’s Equity	$ 1,601	$ 1,592
Total Liabilities and Member’s Equity	$ 10,046	$ 10,051