[Line Items] for A schedule of the asset retirement obligations.

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- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481999/410-20-25-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

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- Definition

The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

+ Details

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Asset Retirement Obligations - MEC - Asset Retirement Obligations by Type (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	$ 1,550	$ 1,428	$ 1,328
Quad Cities Nos. 1 and 2
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	428	407
Wind-powered generating facilities
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	471	452
Fossil-fueled generating facilities
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	477	402
MEC
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	829	778	$ 707
MEC \| Quad Cities Nos. 1 and 2
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	428	407
MEC \| Wind-powered generating facilities
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	318	305
MEC \| Fossil-fueled generating facilities
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	79	62
MEC \| Solar-powered generating facilities and other
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	4	4
Quad Cities Nos. 1 and 2 \| MEC
Asset Retirement Obligations By Type [Line Items]
Quad Cities Station nuclear decommissioning trust funds	$ 871	$ 767