CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities:
Net income	$ 223	$ 224
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	525	659
Amortization of deferred financing costs	10	10
Deferred income taxes	29	(51)
Changes in other assets and liabilities:
Accounts and notes receivable, net	(131)	(141)
Accounts receivable/payable–affiliated companies	(49)	103
Inventory	(3)	(5)
Accounts payable	105	3
Taxes receivable	6	59
Interest and taxes accrued	(28)	(9)
Net regulatory assets and liabilities	(149)	(70)
Other current assets	2	3
Other current liabilities	25	24
Other assets	2	9
Other liabilities	(1)	3
Other, net	(4)	(1)
Net cash provided by operating activities	562	820
Cash Flows from Investing Activities:
Capital expenditures	(603)	(655)
Decrease in notes receivable–affiliated companies	29	0
Decrease (increase) in restricted cash of Bond Companies	8	(2)
Other, net	2	13
Net cash used in investing activities	(564)	(644)
Cash Flows from Financing Activities:
Proceeds from long-term debt, net	298	600
Payments of long-term debt	(347)	(527)
Decrease in short-term notes payable–affiliated companies	0	(183)
Dividend to parent	(87)	(54)
Debt issuance costs	(3)	(6)
Net cash used in financing activities	(139)	(170)
Net Increase (Decrease) in Cash and Cash Equivalents	(141)	6
Cash and Cash Equivalents at Beginning of Period	341	264
Cash and Cash Equivalents at End of Period	200	270
Cash Payments/Receipts:
Interest, net of capitalized interest	176	178
Income taxes, net	76	82
Non-cash transactions:
Accounts payable related to capital expenditures	$ 70	$ 52