Consolidated Statements of Cash Flows - PECO - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net income	$ 2,328	$ 2,171	$ 1,829
Adjustments to reconcile net income to net cash flows used in operating activities:
Depreciation and amortization	3,506	3,533	7,573
Deferred income taxes and amortization of investment tax credits	319	255	18
Other non-cash operating activities	(335)	370	(200)
Changes in assets and liabilities:
Accounts receivable	(37)	(1,222)	(703)
Inventories	(45)	(121)	(141)
Accounts payable and accrued expenses	(191)	1,318	440
Income taxes	48	(4)	327
Regulatory assets and liabilities, net	439	1,326	634
Pension and non-pension postretirement benefit contributions	(129)	(616)	(665)
Other assets and liabilities	(188)	(905)	(3,777)
Net cash flows provided by operating activities	4,703	4,870	3,012
Cash flows from investing activities
Capital expenditures	(7,408)	(7,147)	(7,981)
Other investing activities	8	0	26
Net cash flows used in investing activities	(7,375)	(6,990)	(3,317)
Cash flows from financing activities
Changes in short-term borrowings	(313)	986	269
Issuance of long-term debt	5,825	6,309	3,481
Retirement of long-term debt	(1,713)	(2,073)	(1,640)
Dividends paid on common stock	(1,433)	(1,334)	(1,497)
Other financing activities	(114)	(102)	(80)
Net cash flows provided by financing activities	2,683	1,591	758
(Decrease) increase in cash, restricted cash, and cash equivalents	11	(529)	453
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619	1,166
Cash, restricted cash, and cash equivalents at end of period	1,101	1,090	1,619
PECO Energy Co
Cash flows from operating activities
Net income	563	576	504
Adjustments to reconcile net income to net cash flows used in operating activities:
Depreciation and amortization	397	373	348
Deferred income taxes and amortization of investment tax credits	(43)	70	11
Other non-cash operating activities	13	40	0
Changes in assets and liabilities:
Accounts receivable	67	(205)	(35)
Inventories	34	(56)	(26)
Accounts payable and accrued expenses	(78)	152	15
Income taxes	86	(20)	5
Regulatory assets and liabilities, net	(31)	(45)	(21)
Pension and non-pension postretirement benefit contributions	(1)	(18)	(18)
Other assets and liabilities	13	5	(31)
Net cash flows provided by operating activities	1,019	841	773
Cash flows from investing activities
Capital expenditures	(1,426)	(1,349)	(1,240)
Other investing activities	2	8	9
Net cash flows used in investing activities	(1,424)	(1,341)	(1,231)
Cash flows from financing activities
Changes in short-term borrowings	(74)	239	0
Issuance of long-term debt	575	775	750
Retirement of long-term debt	(50)	(350)	(300)
Change in Exelon intercompany money pool	0	0	(40)
Dividends paid on common stock	(405)	(399)	(339)
Contributions from parent	348	274	414
Other financing activities	(6)	(15)	(9)
Net cash flows provided by financing activities	388	524	476
(Decrease) increase in cash, restricted cash, and cash equivalents	(17)	24	18
Cash, restricted cash, and cash equivalents at beginning of period	68	44	26
Cash, restricted cash, and cash equivalents at end of period	51	68	44
PECO Energy Co | Related Party
Changes in assets and liabilities:
Receivables from and payables to affiliates, net	$ (1)	$ (31)	$ 21