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Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2025

Retirement Benefits [Abstract]

Plan Contributions

The following table includes information related to the Duke Energy Registrants' contributions to its qualified defined benefit pension plans. There were no contributions made during the nine months ended September 30, 2025.

Nine Months Ended 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

Contributions made:

2024

100

26

23

14

9

5

8

3

Components of Net Periodic Pension Costs

The following tables include the components of net periodic pension costs for qualified pension plans.

			Three Months Ended September 30, 2025
									Duke												Duke						Duke						Duke						Duke
			Duke						Energy						Progress						Energy						Energy						Energy						Energy
(in millions)			Energy						Carolinas						Energy						Progress						Florida						Ohio						Indiana						Piedmont
Service cost			$	26					$	9					$	8					$	5					$	3					$	1					$	1					$	1
Interest cost on projected benefit obligation			83						20						25						11						14						4						6						3
Expected return on plan assets			(149)						(38)						(55)						(24)						(30)						(6)						(10)						(5)
Amortization of actuarial loss			16						3						5						2						2						1						2						1
Amortization of prior service credit			(4)						—						—						—						—						—						—						(2)
Amortization of settlement charges			6						3						1						1						1						—						—						1
Net periodic pension costs			$	(22)					$	(3)					$	(16)					$	(5)					$	(10)					$	—					$	(1)					$	(1)

			Three Months Ended 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
Service cost			$	28					$	9					$	8					$	5					$	3					$	1					$	1					$	1
Interest cost on projected benefit obligation			82						19						26						12						14						5						6						2
Expected return on plan assets			(154)						(41)						(55)						(25)						(29)						(6)						(10)						(5)
Amortization of actuarial loss			9						2						2						1						1						—						1						1
Amortization of prior service credit			(3)						—						—						—						—						—						—						(1)
Amortization of settlement charges			17						5						7						6						—						2						—						2
Net periodic pension costs			$	(21)					$	(6)					$	(12)					$	(1)					$	(11)					$	2					$	(2)					$	—

			Nine Months Ended September 30, 2025
									Duke												Duke						Duke						Duke						Duke
			Duke						Energy						Progress						Energy						Energy						Energy						Energy
(in millions)			Energy						Carolinas						Energy						Progress						Florida						Ohio						Indiana						Piedmont
Service cost			$	80					$	27					$	23					$	14					$	9					$	2					$	4					$	3
Interest cost on projected benefit obligation			247						59						77						34						43						12						19						8
Expected return on plan assets			(447)						(114)						(165)						(73)						(90)						(17)						(30)						(15)
Amortization of actuarial loss			46						10						14						6						6						2						4						3
Amortization of prior service credit			(10)						—						—						—						—						—						(1)						(5)
Amortization of settlement charges			19						9						5						4						2						—						1						3
Net periodic pension costs			$	(65)					$	(9)					$	(46)					$	(15)					$	(30)					$	(1)					$	(3)					$	(3)

			Nine Months Ended 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
Service cost			$	85					$	28					$	24					$	15					$	10					$	2					$	4					$	3
Interest cost on projected benefit obligation			247						59						78						36						42						13						19						7
Expected return on plan assets			(462)						(122)						(163)						(75)						(87)						(19)						(31)						(15)
Amortization of actuarial loss			25						6						7						4						3						1						3						2
Amortization of prior service credit			(10)						—						—						—						—						—						(1)						(5)
Amortization of settlement charges			26						9						9						8						1						2						1						4
Net periodic pension costs			$	(89)					$	(20)					$	(45)					$	(12)					$	(31)					$	(1)					$	(5)					$	(4)

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Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

+ References

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Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

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