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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Reserves
The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Other within Other Noncurrent Liabilities on the Condensed Consolidated Balance Sheets.
(in millions)June 30, 2023December 31, 2022
Reserves for Environmental Remediation
Duke Energy$92 $84 
Duke Energy Carolinas23 22 
Progress Energy23 19 
Duke Energy Progress11 8 
Duke Energy Florida11 11 
Duke Energy Ohio36 33 
Duke Energy Indiana2 3 
Piedmont8 7