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v3.25.4

Investments in Debt and Equity Securities (Maturities) (Details) $ in Millions | Dec. 31, 2025 USD ($)
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Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | $ 108
Due after one through five years | 1,130
Due after five through 10 years | 955
Due after 10 years | 2,246
Total | 4,439
Duke Energy Carolinas |
Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | 15
Due after one through five years | 564
Due after five through 10 years | 513
Due after 10 years | 1,257
Total | 2,349
Progress Energy |
Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | 92
Due after one through five years | 501
Due after five through 10 years | 395
Due after 10 years | 880
Total | 1,868
Duke Energy Progress |
Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | 17
Due after one through five years | 473
Due after five through 10 years | 378
Due after 10 years | 830
Total | 1,698
Duke Energy Florida |
Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | 75
Due after one through five years | 28
Due after five through 10 years | 17
Due after 10 years | 50
Total | 170
Duke Energy Indiana |
Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | 1
Due after one through five years | 8
Due after five through 10 years | 6
Due after 10 years | 14
Total | $ 29

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- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 320 -Name Accounting Standards Codification -Section 50 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477268/942-320-50-3A + Details
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- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 320 -Name Accounting Standards Codification -Section 50 -Paragraph 3A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477268/942-320-50-3A + Details
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