Asset Retirement Obligations and Accrued Environmental Costs (Tables)

3 Months Ended

Mar. 31, 2026

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Asset Retirement Obligations and Accrued Environmental Costs

The carrying value of AROs and accrued environmental costs were:



	March 31, 2026		December 31, 2025
Asset retirement obligations	$	522	$	514
Accrued environmental costs	20		20
Total asset retirement obligations and accrued environmental costs	542		534
Less: asset retirement obligations and accrued environmental costs due within one year (a)	46		40

Asset retirement obligations and accrued environmental costs due after one year	$	496	$	494

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(a)Presented as “Other current liabilities” on the Consolidated Balance Sheets.

Schedule of Changes in Asset Retirement Obligations

The changes of the ARO carrying value during the period were:



	2026
Carrying value January 1,	$	514

Obligations settled	(6)
Accretion expense	14


Carrying value, March 31,	$	522

Schedule of Disaggregation of Asset Retirement Obligations

The disaggregation of ARO carrying values on the Consolidated Balance Sheets was:



	March 31, 2026		December 31, 2025

Nuclear (a)	$	281	$	272
Non-nuclear (b)	241		242
Carrying value	$	522	$	514

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(a)Obligations are expected to be settled with available funds in the NDT at the time of decommissioning. See Note 6 for additional information on the NDT.

(b)Certain obligations are: (i) partially supported by surety bonds, some of which have been collateralized with LCs; or (ii) partially prefunded under phased installment agreements.