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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2025
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, 2025December 31, 2024
Reserves for Environmental Remediation
Duke Energy$72 $68 
Duke Energy Carolinas36 24 
Progress Energy20 19 
Duke Energy Progress10 
Duke Energy Florida10 10 
Duke Energy Ohio12 21 
Duke Energy Indiana2 
Piedmont2 
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, 2025
Contract
(in millions) Expiration20262027202820292030ThereafterTotal
Duke Energy Progress(a)
2028-2042
$18 $18 $18 $$$29 $88 
Duke Energy Ohio(b)
2027191 125 — — — — 316 
Duke Energy Indiana(b)
2027
73 — — — — 80 
(a)    Contracts represent between 18% and 100% of net plant output.
(b)    Share of net plant output varies.
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, 2025.
(in millions)20262027202820292030ThereafterTotal
Duke Energy Ohio$133 $136 $135 $131 $118 $828 $1,481 
Piedmont414 400 335 265 262 605 2,281