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	$ 201	$ 126
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	134	123
Amortization of deferred financing costs	4	4
Deferred income taxes	115	82
Write-down of natural gas inventory	0	1
Equity in earnings of unconsolidated affiliate, net of distributions	(131)	(91)
Changes in other assets and liabilities, excluding acquisitions:
Accounts receivable and unbilled revenues, net	295	221
Accounts receivable/payable–affiliated companies	(1)	(8)
Inventory	(18)	66
Accounts payable	(203)	(96)
Fuel cost recovery	(12)	(17)
Interest and taxes accrued	(27)	(21)
Non-trading derivatives, net	(49)	21
Margin deposits, net	(43)	65
Other current assets	19	(8)
Other current liabilities	(13)	16
Other assets	(18)	4
Other liabilities	24	13
Other, net	1	2
Net cash provided by operating activities	278	503
Cash Flows from Investing Activities:
Capital expenditures	(223)	(230)
Distribution from unconsolidated affiliate in excess of cumulative earnings	149	149
Decrease in notes receivable–unconsolidated affiliate	0	363
Acquisitions, net of cash acquired	(132)	(98)
Other, net	1	(2)
Net cash provided by (used in) investing activities	(205)	182
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	(11)	(23)
Proceeds from (payments of) commercial paper, net	149	(43)
Payments of long-term debt	0	(325)
Dividends to parent	(248)	(363)
Debt issuance costs	(1)	(1)
Contribution from parent	38	73
Other, net	0	(2)
Net cash used in financing activities	(73)	(684)
Net Increase in Cash and Cash Equivalents	0	1
Cash and Cash Equivalents at Beginning of Period	1	0
Cash and Cash Equivalents at End of Period	1	1
Cash Payments:
Interest, net of capitalized interest	56	63
Income taxes, net	3	3
Non-cash transactions:
Accounts payable related to capital expenditures	$ 44	$ 36