CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows from Operating Activities:
Net income	$ 224	$ 224
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	659	526
Amortization of deferred financing costs	10	11
Deferred income taxes	(51)	(114)
Changes in other assets and liabilities:
Accounts and notes receivable, net	(141)	(81)
Accounts receivable/payable–affiliated companies	103	(23)
Inventory	(5)	1
Accounts payable	3	(16)
Taxes receivable	59	103
Interest and taxes accrued	(9)	12
Non-trading derivatives, net	1	0
Net regulatory assets and liabilities	(70)	36
Other current assets	3	19
Other current liabilities	24	(15)
Other assets	9	(1)
Other liabilities	3	5
Other, net	(2)	0
Net cash provided by operating activities	820	687
Cash Flows from Investing Activities:
Capital expenditures	(655)	(677)
Decrease in notes receivable–affiliated companies	0	107
Decrease (increase) in restricted cash of Bond Companies	(2)	9
Other, net	13	(9)
Net cash used in investing activities	(644)	(570)
Cash Flows from Financing Activities:
Proceeds from long-term debt	600	0
Payments of long-term debt	(527)	(310)
Increase (decrease) in short-term notes payable–affiliated companies	(183)	120
Dividend to parent	(54)	0
Debt issuance costs	(6)	0
Net cash used in financing activities	(170)	(190)
Net Increase (Decrease) in Cash and Cash Equivalents	6	(73)
Cash and Cash Equivalents at Beginning of Period	264	290
Cash and Cash Equivalents at End of Period	270	217
Cash Payments:
Interest, net of capitalized interest	178	169
Income taxes, net	82	157
Non-cash transactions:
Accounts payable related to capital expenditures	$ 52	$ 52