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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2022
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, 2022December 31, 2021
Reserves for Environmental Remediation
Duke Energy$90 $88 
Duke Energy Carolinas24 19 
Progress Energy23 23 
Duke Energy Progress12 11 
Duke Energy Florida10 11 
Duke Energy Ohio33 34 
Duke Energy Indiana3 4 
Piedmont7 9