Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 58	$ 48
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	75	62
Decrease in net liabilities from price risk management activities	(19)	(37)
Regulatory deferral - price risk management activities	19	37
Deferred income taxes	15	13
Pension and other postretirement benefits	8	10
Allowance for equity funds used during construction	(6)	(2)
Regulatory deferral of settled derivative instruments	5	5
Decoupling mechanism deferrals, net of amortization	4	5
Other non-cash income and expenses, net	7	8
Changes in working capital:
Decrease in accounts receivable and unbilled revenues	14	29
(Increase) decrease in margin deposits, net	(8)	13
Decrease in accounts payable and accrued liabilities	(6)	(4)
Other working capital items, net	(13)	(12)
Cash received to be returned to customers pursuant to the Residential Exchange Program	15	2
Other, net	(2)	(2)
Net cash provided by operating activities	158	165
Cash flows from investing activities:
Capital expenditures	(185)	(108)
Sales of nuclear decommissioning trust securities	6	8
Purchases of nuclear decommissioning trust securities	(6)	(9)
Proceeds from sale of property	4	0
Other, net	2	2
Net cash used in investing activities	(179)	(107)
Cash flows from financing activities:
Maturities of commercial paper, net	0	(17)
Dividends paid	(22)	(20)
Net cash used in financing activities	(22)	(37)
(Decrease) increase in cash and cash equivalents	(43)	21
Cash and cash equivalents, beginning of period	107	12
Cash and cash equivalents, end of period	64	33
Supplemental cash flow information is as follows:
Cash paid for interest, net of amounts capitalized	10	13
Non-cash investing and financing activities:
Accrued dividends payable	22	20
Accrued capital additions	69	11
Preliminary engineering costs transferred to Construction work-in-progress from Other noncurrent assets	$ 0	$ 4