CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities:
Net income	$ 126	$ 131
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	123	112
Amortization of deferred financing costs	4	5
Deferred income taxes	82	80
Write-down of natural gas inventory	1	2
Equity in (earnings) losses of unconsolidated affiliate, net of distributions	(91)	50
Changes in other assets and liabilities, excluding acquisitions:
Accounts receivable and unbilled revenues, net	221	442
Accounts receivable/payable–affiliated companies	(8)	2
Inventory	66	105
Accounts payable	(96)	(298)
Fuel cost recovery	(17)	86
Interest and taxes accrued	(21)	(26)
Non-trading derivatives, net	21	2
Margin deposits, net	65	25
Other current assets	(8)	10
Other current liabilities	16	(20)
Other assets	4	8
Other liabilities	13	14
Other, net	1	1
Net cash provided by operating activities	502	731
Cash Flows from Investing Activities:
Capital expenditures	(230)	(248)
Distribution from unconsolidated affiliate in excess of cumulative earnings	149	0
Decrease in notes receivable–unconsolidated affiliate	363	0
Acquisitions, net of cash acquired	(98)	0
Other, net	(2)	2
Net cash provided by (used in) investing activities	182	(246)
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	(23)	(29)
Payments of commercial paper, net	(43)	(269)
Payments of long-term debt	(325)	0
Dividends to parent	(363)	0
Debt issuance costs	(1)	0
Decrease in notes payable–affiliated companies	0	(188)
Contribution from parent	73	0
Other, net	(1)	0
Net cash used in financing activities	(683)	(486)
Net Increase (Decrease) in Cash and Cash Equivalents	1	(1)
Cash and Cash Equivalents at Beginning of Period	0	2
Cash and Cash Equivalents at End of Period	1	1
Cash Payments:
Interest, net of capitalized interest	63	64
Income taxes, net	3	6
Non-cash transactions:
Accounts payable related to capital expenditures	$ 36	$ 34