Variable Interest Entities (Schedule of Accounts Receivable Securitizations) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Long-Term Debt	$ 54,985	$ 51,123
Duke Energy Carolinas
Variable Interest Entity [Line Items]
Long-Term Debt	11,142	10,633
Duke Energy Progress
Variable Interest Entity [Line Items]
Long-Term Debt	7,902	7,451
Duke Energy Florida
Variable Interest Entity [Line Items]
Long-Term Debt	$ 7,416	7,051
CRC \| VIE
Variable Interest Entity [Line Items]
Expiration date	Dec. 01, 2020
Facility Size	$ 350
Long-Term Debt	350	325
Restricted Receivables	$ 522	564
DERF \| Duke Energy Carolinas \| VIE
Variable Interest Entity [Line Items]
Expiration date	Dec. 01, 2022
Facility Size	$ 475
Long-Term Debt	474	450
Restricted Receivables	$ 642	699
DEPR \| Duke Energy Progress \| VIE
Variable Interest Entity [Line Items]
Expiration date	Feb. 01, 2021
Facility Size	$ 325
Long-Term Debt	325	300
Restricted Receivables	$ 489	547
DEFR \| Duke Energy Florida \| VIE
Variable Interest Entity [Line Items]
Expiration date	Apr. 01, 2021
Facility Size	$ 250
Long-Term Debt	250	225
Restricted Receivables	$ 336	$ 357

The amount owed to the reporting entity by counterparties in securitized loan transactions.

No definition available.

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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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