Changes in Accumulated Other Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2024

Changes in Accumulated Other Comprehensive Income [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income (Loss)

The following table presents changes in Exelon's AOCI, net of tax, by component:

Three Months Ended March 31, 2024	Cash Flow Hedges		Pension and Non-Pension Postretirement Benefit Plan Items(a)		Total
Balance at December 31, 2023	$	(3)	$	(723)	$	(726)
OCI before reclassifications	34		(24)		10
Amounts reclassified from AOCI	(1)		5		4
Net current-period OCI	$	33	$	(19)	$	14
Balance at March 31, 2024	$	30	$	(742)	$	(712)

Three Months Ended March 31, 2023	Cash Flow Hedges		Pension and Non-Pension Postretirement Benefit Plan Items(a)		Total
Balance at December 31, 2022	$	2	$	(640)	$	(638)
OCI before reclassifications	6		(10)		(4)
Amounts reclassified from AOCI	—		3		3
Net current-period OCI	$	6	$	(7)	$	(1)
Balance at March 31, 2023	$	8	$	(647)	$	(639)

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(a)This AOCI component is included in the computation of net periodic pension and OPEB cost. See Note 14 — Retirement Benefits of the 2023 Form 10-K and Note 7 — Retirement Benefits for additional information. See Exelon's Statements of Operations and Comprehensive Income for individual components of AOCI.

Schedule of Income Taxes Allocated to Other Comprehensive Income (Loss) Components

The following table presents Income tax benefit (expense) allocated to each component of Exelon's Other comprehensive income (loss):

	Three Months Ended March 31,
	2024		2023
Pension and non-pension postretirement benefit plans:
Actuarial losses reclassified to periodic benefit cost	$	(2)	$	(1)
Pension and non-pension postretirement benefit plans valuation adjustments	8		3
Unrealized gains on cash flow hedges	(10)		(1)