CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities
Net income	$ 708	$ 673
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	1,210	1,043
Nuclear fuel amortization	61	56
Deferred income taxes	(135)	(67)
Allowance for equity funds used during construction	(33)	(32)
Earnings from equity method investments	(26)	(34)
Dividends from equity method investments	20	21
Provision for bad debts	30	27
Share-based compensation expense	14	21
Changes in operating assets and liabilities:
Accounts receivable	(97)	(63)
Accrued unbilled revenues	70	14
Inventories	(44)	7
Other current assets	26	24
Accounts payable	137	(15)
Net regulatory assets and liabilities	213	(794)
Other current liabilities	(134)	(265)
Pension and other employee benefit obligations	(32)	(128)
Other, net	0	1
Net cash provided by operating activities	1,988	489
Investing activities
Capital/construction expenditures	(2,040)	(1,967)
Purchase of investment securities	(787)	(628)
Proceeds from the sale of investment securities	769	410
Other, net	3	(17)
Net cash used in investing activities	(2,055)	(2,202)
Financing activities
(Repayments of) proceeds from short-term borrowings, net	(869)	1,161
Proceeds from issuances of long-term debt	2,066	1,821
Repayments of long-term debt, including reacquisition premiums	(600)	(399)
Proceeds from issuance of common stock	151	11
Dividends paid	(497)	(460)
Other, net	(15)	(12)
Net cash provided by financing activities	236	2,122
Net change in cash, cash equivalents and restricted cash	169	409
Cash, cash equivalents and restricted cash at beginning of period	166	129
Cash, cash equivalents and restricted cash at end of period	335	538
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(425)	(390)
Cash paid for income taxes, net	(9)	(5)
Supplemental disclosure of non-cash investing and financing transactions:
Accrued property, plant and equipment additions	401	509
Inventory transfers to property, plant and equipment	30	43
Operating lease right-of-use assets	15	1
Allowance for equity funds used during construction	33	32
Issuance of common stock for reinvested dividends and/or equity awards	$ 27	$ 35