CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities
Net income	$ 167	$ 129
Adjustments to reconcile net income to cash (used in) provided by operating activities:
Depreciation and amortization	177	158
Deferred income taxes	5	6
Amortization of investment tax credits	(1)	(1)
Allowance for equity funds used during construction	(5)	(9)
Provision for bad debts	5	0
Net realized and unrealized hedging and derivative transactions	(1)	2
Changes in operating assets and liabilities:
Accounts receivable	(63)	8
Accrued unbilled revenues	66	75
Inventories	17	30
Other current assets	10	8
Accounts payable	(44)	(95)
Net regulatory assets and liabilities	(555)	43
Other current liabilities	18	33
Pension and other employee benefit obligations	(48)	(48)
Other, net	(1)	(6)
Net cash (used in) provided by operating activities	(253)	333
Investing activities
Utility capital/construction expenditures	(320)	(458)
Investments in utility money pool arrangement	(180)	0
Repayments from utility money pool arrangement	167	0
Net cash used in investing activities	(333)	(458)
Financing activities
Repayments of short-term borrowings, net	(136)	0
Borrowings under utility money pool arrangement	435	446
Repayments under utility money pool arrangement	(492)	(289)
Proceeds from issuance of long-term debt	738	0
Capital contributions from parent	307	83
Dividends paid to parent	(105)	(111)
Net cash provided by financing activities	747	129
Net change in cash, cash equivalents and restricted cash	161	4
Cash, cash equivalents and restricted cash at beginning of period	28	11
Cash, cash equivalents and restricted cash at end of period	189	15
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(83)	(73)
Cash (paid) received for income taxes, net	(22)	2
Supplemental disclosure of non-cash investing and financing transactions:
Accrued property, plant and equipment additions	112	132
Inventory transfers to property, plant and equipment	9	8
Allowance for equity funds used during construction	$ 5	$ 9