CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)		Jun. 30, 2019 USD ($)
Operating activities
Net income	$ 582		$ 553
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	942		881
Nuclear fuel amortization	65		58
Deferred income taxes	0		47
Allowance for equity funds used during construction	(61)		(40)
Equity earnings of unconsolidated subsidiaries	(17)		(19)
Dividends from unconsolidated subsidiaries	21		20
Provision for Bad Debts	26		17
Share-based compensation expense	41		35
Changes in operating assets and liabilities:
Accounts receivable	19		105
Accrued unbilled revenues	97		115
Inventories	15		25
Other current assets	7		19
Accounts payable	(160)		(157)
Net regulatory assets and liabilities	12		25
Other current liabilities	(241)		(195)
Pension and other employee benefit obligations	(146)		(139)
Other, net	(54)		(16)
Net cash provided by operating activities	1,148		1,334
Investing activities
Capital/construction expenditures	(2,569)		(1,689)
Purchases of investment securities	(1,160)		(488)
Proceeds from the sale of investment securities	1,150		478
Other, net	(1)		(9)
Net cash used in investing activities	(2,580)		(1,708)
Financing activities
Proceeds from short-term borrowings, net	815		559
Proceeds from issuances of long-term debt	2,447		819
Repayments of long-term debt, including reacquisition premiums	0		(400)
Dividends paid	(421)		(387)
Other, net	(23)		(11)
Net cash provided by financing activities	2,818		580
Net change in cash, cash equivalents and restricted cash	1,386		206
Cash, cash equivalents and restricted cash at beginning of period	248		147
Cash, cash equivalents and restricted cash at end of period (a)	1,634	[1]	353
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(364)		(344)
Cash (paid) received for income taxes, net	(10)		54
Supplemental disclosure of non-cash investing and financing transactions:
Accrued property, plant and equipment additions	436		304
Inventory transfers to property, plant and equipment	194		40
Operating lease right-of-use assets	8		1,843
Allowance for equity funds used during construction	61		40
Issuance of common stock for equity awards	35		$ 32
MEC Holdings LLC [Member]
Supplemental disclosure of non-cash investing and financing transactions:
Restricted Cash	9
Restricted Cash	$ 9

[1] ^(a) As of June 30, 2020, $9 million of cash was recorded in Prepayments and other current assets related to MEC.