CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows from Operating Activities:
Net income	$ 93	$ 88
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	332	406
Amortization of deferred financing costs	6	7
Deferred income taxes	23	(17)
Changes in other assets and liabilities:
Accounts and notes receivable, net	(63)	(80)
Accounts receivable/payable–affiliated companies	(35)	22
Inventory	(1)	(4)
Accounts payable	57	(7)
Taxes receivable	(38)	59
Interest and taxes accrued	(41)	(16)
Net regulatory assets and liabilities	(59)	(69)
Other current assets	5	18
Other current liabilities	(7)	14
Other assets	4	7
Other liabilities	1	1
Other, net	5	1
Net cash provided by operating activities	282	430
Cash Flows from Investing Activities:
Capital expenditures	(414)	(444)
Increase in notes receivable–affiliated companies	5	0
Decrease (increase) in restricted cash of Bond Companies	8	(2)
Other, net	(12)	(8)
Net cash used in investing activities	(413)	(454)
Cash Flows from Financing Activities:
Proceeds from long-term debt, net	298	300
Payments of long-term debt	(219)	(408)
Increase in short-term notes payable–affiliated companies	0	132
Dividend to parent	(42)	(10)
Debt issuance costs	(3)	(3)
Other, net	1	0
Net cash provided by financing activities	35	11
Net Decrease in Cash and Cash Equivalents	(96)	(13)
Cash and Cash Equivalents at Beginning of Period	341	264
Cash and Cash Equivalents at End of Period	245	251
Cash Payments/Receipts:
Interest, net of capitalized interest	94	96
Income taxes (refunds), net	76	(8)
Non-cash transactions:
Accounts payable related to capital expenditures	$ 75	$ 52