Consolidated Statements of Cash Flows (Unaudited) - ComEd - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net income	$ 658	$ 669
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion	880	860
Gain on sales of assets and businesses	(2)	0
Deferred income taxes and amortization of investment tax credits	46	113
Net fair value changes related to derivatives	1	0
Other non-cash operating activities	39	(138)
Changes in assets and liabilities:
Accounts receivable	(309)	106
Inventories	12	102
Accounts payable and accrued expenses	(238)	(482)
Collateral paid, net	7	(214)
Income taxes	21	23
Regulatory assets and liabilities, net	252	(324)
Pension and non-pension postretirement benefit contributions	(111)	(44)
Other assets and liabilities	(264)	(187)
Net cash flows provided by operating activities	992	484
Cash flows from investing activities
Capital expenditures	(1,767)	(1,881)
Other investing activities	(2)	10
Net cash flows used in investing activities	(1,767)	(1,871)
Cash flows from financing activities
Changes in short-term borrowings	(317)	(1,130)
Proceeds from short-term borrowings with maturities greater than 90 days	150	0
Repayments on short-term borrowings with maturities greater than 90 days	(150)	(150)
Issuance of long-term debt	2,625	3,925
Retirement of long-term debt	(901)	(857)
Dividends paid on common stock	(381)	(358)
Other financing activities	(55)	(60)
Net cash flows provided by financing activities	982	1,380
Increase in cash, restricted cash, and cash equivalents	207	(7)
Cash, restricted cash, and cash equivalents at beginning of period	1,101	1,090
Cash, restricted cash, and cash equivalents at end of period	1,308	1,083
Supplemental cash flow information
Decrease in capital expenditures not paid	(117)	(201)
Commonwealth Edison Co
Cash flows from operating activities
Net income	193	241
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion	362	338
Deferred income taxes and amortization of investment tax credits	(1)	55
Other non-cash operating activities	(6)	(153)
Changes in assets and liabilities:
Accounts receivable	(133)	96
Receivables from and payables to affiliates, net	0	10
Inventories	(11)	(21)
Accounts payable and accrued expenses	(116)	(306)
Collateral paid, net	8	(4)
Income taxes	21	15
Regulatory assets and liabilities, net	315	(338)
Pension and non-pension postretirement benefit contributions	(5)	(23)
Other assets and liabilities	(67)	(22)
Net cash flows provided by operating activities	560	(112)
Cash flows from investing activities
Capital expenditures	(594)	(617)
Other investing activities	1	1
Net cash flows used in investing activities	(593)	(616)
Cash flows from financing activities
Changes in short-term borrowings	128	(18)
Repayments on short-term borrowings with maturities greater than 90 days	0	(150)
Issuance of long-term debt	0	975
Dividends paid on common stock	(194)	(187)
Contributions from parent	39	186
Other financing activities	1	(11)
Net cash flows provided by financing activities	(26)	795
Increase in cash, restricted cash, and cash equivalents	(59)	67
Cash, restricted cash, and cash equivalents at beginning of period	686	511
Cash, restricted cash, and cash equivalents at end of period	627	578
Supplemental cash flow information
Decrease in capital expenditures not paid	$ (74)	$ (35)