CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities
Net income	$ 301	$ 237
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	357	317
Deferred income taxes	9	9
Amortization of investment tax credits	(1)	(1)
Allowance for equity funds used during construction	(12)	(20)
Provision for bad debts	10	11
Changes in operating assets and liabilities:
Accounts receivable	5	25
Accrued unbilled revenues	53	65
Inventories	8	20
Other current assets	13	7
Accounts payable	(10)	(83)
Net regulatory assets and liabilities	(554)	41
Other current liabilities	(187)	(86)
Pension and other employee benefit obligations	(50)	(47)
Other, net	60	(10)
Net cash provided by operating activities	2	485
Investing activities
Utility capital/construction expenditures	(705)	(918)
Investments in utility money pool arrangement	(240)	(366)
Repayments from utility money pool arrangement	240	366
Net cash used in investing activities	(705)	(918)
Financing activities
Repayments of short-term borrowings, net	(136)	0
Borrowings under utility money pool arrangement	443	1,311
Repayments under utility money pool arrangement	(500)	(1,350)
Proceeds from issuance of long-term debt	738	735
Capital contributions from parent	447	778
Dividends paid to parent	(221)	(574)
Net cash provided by financing activities	771	900
Net change in cash, cash equivalents and restricted cash	68	467
Cash, cash equivalents and restricted cash at beginning of period	28	11
Cash, cash equivalents and restricted cash at end of period	96	478
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(116)	(107)
Cash paid for income taxes, net	(15)	(18)
Supplemental disclosure of non-cash investing and financing transactions:
Accrued property, plant and equipment additions	126	113
Inventory transfers to property, plant and equipment	10	17
Allowance for equity funds used during construction	12	20
Operating lease right-of-use assets	$ 1	$ 8