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	$ 239	$ 169
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	202	185
Amortization of deferred financing costs	7	7
Deferred income taxes	140	108
Write-down of natural gas inventory	0	1
Equity in earnings of unconsolidated affiliate, net of distributions	(199)	(164)
Changes in other assets and liabilities, excluding acquisitions:
Accounts receivable and unbilled revenues, net	346	220
Accounts receivable/payable–affiliated companies	(1)	(5)
Inventory	(49)	(1)
Accounts payable	(227)	(85)
Fuel cost recovery	(30)	(43)
Interest and taxes accrued	(9)	(8)
Non-trading derivatives, net	(51)	23
Margin deposits, net	(49)	65
Other current assets	23	(11)
Other current liabilities	(5)	15
Other assets	(32)	(5)
Other liabilities	6	1
Other, net	1	2
Net cash provided by operating activities	312	474
Cash Flows from Investing Activities:
Capital expenditures	(373)	(378)
Distribution from unconsolidated affiliate in excess of cumulative earnings	223	223
Decrease in notes receivable–unconsolidated affiliate	0	363
Acquisitions, net of cash acquired	(132)	(102)
Other, net	2	(1)
Net cash provided by (used in) investing activities	(280)	105
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	13	3
Proceeds from (payments of) commercial paper, net	(40)	240
Proceeds from long-term debt	298	0
Payments of long-term debt	0	(325)
Dividends to parent	(337)	(567)
Debt issuance costs	(4)	(1)
Contribution from parent	38	73
Other, net	0	(2)
Net cash used in financing activities	(32)	(579)
Net Increase in Cash and Cash Equivalents	0	0
Cash and Cash Equivalents at Beginning of Period	1	0
Cash and Cash Equivalents at End of Period	1	0
Cash Payments:
Interest, net of capitalized interest	86	90
Income taxes, net	4	3
Non-cash transactions:
Accounts payable related to capital expenditures	$ 53	$ 32