Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 105	$ 98
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	170	165
Deferred income taxes	20	20
Pension and other postretirement benefits	13	14
Allowance for equity funds used during construction	(5)	(15)
Decoupling mechanism deferrals, net of depreciation	(15)	(3)
Other non-cash income and expenses, net	16	12
Changes in working capital:
Decrease in accounts receivable and unbilled revenues	55	59
Increase in inventories	0	(4)
Decrease in margin deposits, net	7	18
Decrease in accounts payable and accrued liabilities	(29)	(13)
Other working capital items, net	11	6
Other, net	(15)	(19)
Net cash provided by operating activities	333	338
Cash flows from investing activities:
Capital expenditures	(245)	(319)
Sales of Nuclear decommissioning trust securities	11	11
Purchases of Nuclear decommissioning trust securities	(9)	(11)
Other, net	(2)	0
Net cash used in investing activities	(245)	(319)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	0	265
Payments on long-term debt	0	(133)
Change in short-term debt	0	(6)
Dividends paid	(57)	(53)
Other	(4)	(3)
Net cash (used in) provided by financing activities	(61)	70
Increase in cash and cash equivalents	27	89
Cash and cash equivalents, beginning of period	6	4
Cash and cash equivalents, end of period	33	93
Supplemental cash flow information is as follows:
Cash paid for interest, net of amounts capitalized	55	49
Cash paid for income taxes	13	7
Non-cash investing and financing activities:
Assets obtained under capital lease	$ 55	$ 57