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Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2024

Asset Retirement Obligation [Abstract]

Schedule of Asset Retirement Obligations

The following table presents the AROs recorded on the Condensed Consolidated Balance Sheets.

			September 30, 2024
									Duke												Duke						Duke						Duke						Duke
			Duke						Energy						Progress						Energy						Energy						Energy						Energy
(in millions)			Energy						Carolinas						Energy						Progress						Florida						Ohio						Indiana						Piedmont
Decommissioning of nuclear power facilities			$	4,634					$	2,024					$	2,605					$	2,483					$	122					$	—					$	—					$	—
Closure of ash impoundments			5,240						1,899						2,019						2,001						18						72						1,249						—
Other			276						57						99						34						65						65						29						27
Total ARO			$	10,150					$	3,980					$	4,723					$	4,518					$	205					$	137					$	1,278					$	27
Less: Current portion			639						253						227						225						2						7						152						—
Total noncurrent ARO			$	9,511					$	3,727					$	4,496					$	4,293					$	203					$	130					$	1,126					$	27

Schedule of Change in Asset Retirement Obligation

The following table presents the change in liability associated with AROs for the Duke Energy Registrants.

									Duke												Duke						Duke						Duke						Duke
			Duke						Energy						Progress						Energy						Energy						Energy						Energy
(in millions)			Energy						Carolinas						Energy						Progress						Florida						Ohio						Indiana						Piedmont
Balance at December 31, 2023(a)			$	9,156					$	4,013					$	4,145					$	3,870					$	275					$	136					$	809					$	26
Accretion expense(b)			316						137						145						138						7						5						33						1
Liabilities settled(c)			(485)						(154)						(254)						(181)						(73)						(6)						(70)						—
Revisions in estimates of cash flows(d)			1,163						(16)						687						691						(4)						2						506						—
Balance at September 30, 2024			$	10,150					$	3,980					$	4,723					$	4,518					$	205					$	137					$	1,278					$	27

(a)Primarily relates to decommissioning nuclear power facilities, closure of ash impoundments, asbestos removal, closure of landfills at fossil generation facilities, retirement of natural gas mains and removal of renewable energy generation assets.

(b)For the nine months ended September 30, 2024, substantially all accretion expense relates to Duke Energy's regulated operations and has been deferred in accordance with regulatory accounting treatment.

(c)Primarily relates to ash impoundment closures and nuclear decommissioning.

(d)The revision amounts represent the change in discounted cash flows for estimated closure costs as evaluated on a site-by-site basis. The increases primarily relate to additional scope requirements to regulate the disposal of CCR in landfills and surface impoundments as a result of the 2024 CCR Rule, including an increase in groundwater monitoring wells.

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- References

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- Definition

Tabular disclosure of the carrying amount of a liability for asset retirement obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Paragraph 1
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

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Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
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