Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Schedule of Legal Reserves

The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Accounts Payable within Other Current Liabilities and Other within Other Noncurrent Liabilities on the Consolidated Balance Sheets.

(in millions)	December 31, 2023		December 31, 2022
Reserves for Environmental Remediation
Duke Energy	$	88	$	84
Duke Energy Carolinas	23		22
Progress Energy	19		19
Duke Energy Progress	9		8
Duke Energy Florida	10		11
Duke Energy Ohio	36		33
Duke Energy Indiana	2		3
Piedmont	7		7

Schedule of Purchase Power Obligations

The following table presents executory purchased power contracts with terms exceeding one year, excluding contracts classified as leases.

		Minimum Purchase Amount at December 31, 2023
	Contract
(in millions)	Expiration	2024		2025		2026		2027		2028		Thereafter		Total
Duke Energy Progress(a)	2028-2032	$	21	$	22	$	18	$	19	$	19	$	7	$	106
Duke Energy Florida(b)	2025	86		91		—		—		—		—		177
Duke Energy Ohio(c)	2025	153		98		—		—		—		—		251
Duke Energy Indiana(c)	2026	12		20		8		—		—		—		40

(a)    Contracts represent between 18% and 100% of net plant output.

(b)    Contracts represent 100% of net plant output.

(c)    Share of net plant output varies. Duke Energy Ohio excludes PPA with OVEC.

Schedule of Natural Gas Supply Contract Commitments

The following table presents future unconditional purchase obligations under natural gas supply and capacity contracts as of December 31, 2023.

(in millions)	2024		2025		2026		2027		2028		Thereafter		Total
Duke Energy Ohio	$	103	$	87	$	57	$	53	$	51	$	574	$	925
Piedmont	295		287		268		209		186		373		1,618