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v3.23.2

Investments in Debt and Equity Securities (Maturities) (Details) $ in Millions | Jun. 30, 2023 USD ($)
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Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | $ 142
Due after one through five years | 699
Due after five through 10 years | 550
Due after 10 years | 1,467
Total | 2,858
Duke Energy Carolinas |
Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | 7
Due after one through five years | 227
Due after five through 10 years | 298
Due after 10 years | 802
Total | 1,334
Progress Energy |
Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | 121
Due after one through five years | 394
Due after five through 10 years | 208
Due after 10 years | 561
Total | 1,284
Duke Energy Progress |
Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | 25
Due after one through five years | 225
Due after five through 10 years | 194
Due after 10 years | 524
Total | 968
Duke Energy Florida |
Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | 96
Due after one through five years | 169
Due after five through 10 years | 14
Due after 10 years | 37
Total | 316
Duke Energy Indiana |
Debt Securities, Available-for-sale [Line Items] |
Due in one year or less | 5
Due after one through five years | 22
Due after five through 10 years | 11
Due after 10 years | 24
Total | $ 62

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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//1943274/2147480832/942-320-50-3A + Details
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