Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2022

Regulated Operations [Abstract]

Schedule of Potential Plant Retirements

The table below contains the net carrying value of generating facilities planned for retirement or included in recent IRPs as evaluated for potential retirement. Dollar amounts in the table below are included in Net property, plant and equipment on the Condensed Consolidated Balance Sheets as of September 30, 2022, and exclude capitalized asset retirement costs.

		Remaining Net
	Capacity	Book Value
	(in MW)	(in millions)
Duke Energy Carolinas
Allen Steam Station Unit 1(a)	167	$	11
Allen Steam Station Unit 5(b)	259	243
Cliffside Unit 5(b)	546	351
Duke Energy Progress
Mayo Unit 1(b)	713	623
Roxboro Units 3-4(b)	1,409	433
Duke Energy Florida
Crystal River Units 4-5(c)	1,442	1,578
Duke Energy Indiana
Gibson Units 1-5(d)	2,845	2,019
Cayuga Units 1-2(d)	1,005	644
Total Duke Energy	8,386	$	5,902

(a)As part of the 2015 resolution of a lawsuit involving alleged New Source Review violations, Duke Energy Carolinas must retire Allen Steam Station Unit 1 by December 31, 2024. The long-term energy options considered in the IRP could result in retirement of this unit earlier than its current estimated useful life.

(b)These units were included in the IRP filed by Duke Energy Carolinas and Duke Energy Progress in North Carolina and South Carolina on September 1, 2020. The long-term energy options considered in the IRP could result in retirement of these units earlier than their current estimated useful lives.

(c)On January 14, 2021, Duke Energy Florida filed the 2021 Settlement agreement with the FPSC, which proposed depreciation rates reflecting retirement dates for Duke Energy Florida's last two coal-fired generating facilities, Crystal River Units 4-5, eight years ahead of schedule in 2034 rather than in 2042. The FPSC approved the 2021 Settlement on May 4, 2021. The remaining net book value reflected in the table above excludes $200 million of accelerated deprecation collected from retail customers pursuant to Duke Energy Florida's 2017 Settlement.

(d)The rate case filed July 2, 2019, included proposed depreciation rates reflecting retirement dates from 2026 to 2038. The depreciation rates reflecting these updated retirement dates were approved by the IURC as part of the rate case order issued on June 29, 2020.