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Supplemental Financial Information - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Supplemental Balance Sheet Information [Line Items]
Accounts payable	$ 2,498	$ 2,369
Compensation-related accruals	404	907
Taxes accrued	287	232
Constellation Energy Generation, LLC
Supplemental Balance Sheet Information [Line Items]
Accounts payable	2,466	2,348
Compensation-related accruals	273	689
Taxes accrued	$ 278	$ 223

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for payroll, employee benefits, incentive compensation and vacation. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Supplemental Balance Sheet Information.

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- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Publisher FASB
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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
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-Name Accounting Standards Codification
-Section S99
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