Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 145	$ 132
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	257	244
Deferred income taxes	35	18
Pension and other postretirement benefits	19	21
Allowance for equity funds used during construction	(9)	(19)
Decoupling mechanism deferrals, net of amortization	(15)	(4)
Other non-cash income and expenses, net	18	12
Changes in working capital:
Decrease in accounts receivable and unbilled revenues	40	53
Decrease in inventories	12	1
Decrease in margin deposits, net	4	25
Increase in accounts payable and accrued liabilities	14	31
Other working capital items, net	20	12
Other, net	(21)	(29)
Net cash provided by operating activities	519	497
Cash flows from investing activities:
Capital expenditures	(369)	(454)
Sales of Nuclear decommissioning trust securities	14	17
Purchases of Nuclear decommissioning trust securities	(12)	(16)
Other, net	(2)	(1)
Net cash used in investing activities	(369)	(454)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	75	265
Payments on long-term debt	(50)	(133)
Change in short-term debt	0	(6)
Dividends paid	(87)	(82)
Other	(5)	(3)
Net cash (used in) provided by financing activities	(67)	41
Increase in cash and cash equivalents	83	84
Cash and cash equivalents, beginning of period	6	4
Cash and cash equivalents, end of period	89	88
Supplemental cash flow information is as follows:
Cash paid for interest, net of amounts capitalized	68	61
Cash paid for income taxes	16	12
Non-cash investing and financing activities:
Assets obtained under capital lease	$ 73	$ 57