Line Of Credit Facility Optional Additional Expansion Amount

No definition available.

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- Definition

Minimum Master Credit Facility Balance Required to be maintained to meet obligations outlined in Plea Agreements

+ References

No definition available.

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- Definition

The amount of subsidiary debt guaranteed by its parent.

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No definition available.

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- Definition

Maximum amount of unsecured variable denomination floating rate demand notes available for sale.

+ References

No definition available.

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- Definition

Maximum amount of unsecured variable denomination floating rate demand notes that can be outstanding at any point in time.

+ References

No definition available.

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- Definition

Principal amount of unsecured variable denomination floating rate demand notes that are outstanding at the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

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- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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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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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

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- Definition

Amount of cash distribution paid to unit-holder of limited liability company (LLC).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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Period Type:	instant

- 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 of long-term loans payable classified as other.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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Period Type:	instant

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

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Debt and Credit Facilities (Narrative) (Details) - USD ($)	1 Months Ended		12 Months Ended
	Jan. 31, 2017	Aug. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Aug. 01, 2016	Jun. 01, 2016
Debt Instrument [Line Items]
Debt issuances			$ 9,127,000,000	$ 2,700,000,000
Other Debt Matters [Abstract]
Demand notes, maximum amount available for sale			3,000,000,000
Demand notes, maximum amount outstanding			1,500,000,000
Principal amount of demand notes			1,090,000,000	1,121,000,000
Subsidiary debt guaranteed by parent			762,000,000	767,000,000
Other Loans [Abstract]
Other loans outstanding against cash surrender value of life insurance policies			$ 661,000,000	629,000,000
Maximum [Member]
Restrictive Debt Covenants [Abstract]
Debt to total capitalization percentage, for each borrower			0.65
Master Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility Size			$ 7,500,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility Size			8,350,000,000
August 2016 Term Loan Facility [Member]
Debt Instrument [Line Items]
Facility Size							$ 1,500,000,000
Term Loan Proceeds			750,000,000
Repayments of Debt			$ 1,500,000,000
Secured Debt [Member] \| Solar Facilities Financing [Member]
Debt Instrument [Line Items]
Debt issuances							333,000,000
Fixed credit spread		1.75%
Debt Instrument, Interest Rate, Increase (Decrease)		0.125%
August 2016 Debt Tranche A Maturing June 2034 [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Interest rate			2.747%
Debt issuances			$ 228,000,000
August 2016 Debt Tranche A Maturing June 2034 [Member] \| Secured Debt [Member] \| Solar Facilities Financing [Member]
Debt Instrument [Line Items]
Debt issuances							228,000,000
August 2016 Debt Tranche B Maturing June 2020 [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Interest rate			2.747%
Debt issuances			$ 105,000,000
August 2016 Debt Tranche B Maturing June 2020 [Member] \| Secured Debt [Member] \| Solar Facilities Financing [Member]
Debt Instrument [Line Items]
Debt issuances							105,000,000
May 2016 Debt Maturing May 2046 [Member] \| First Mortgage [Member]
Debt Instrument [Line Items]
Interest rate			3.75%
Debt issuances			$ 500,000,000
Repayments of Debt			325,000,000
Duke Energy Carolinas [Member]
Debt Instrument [Line Items]
Debt issuances			1,600,000,000	500,000,000
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid			$ 2,000,000,000	401,000,000	$ 500,000,000
Duke Energy Carolinas [Member] \| Maximum [Member]
Restrictive Debt Covenants [Abstract]
Debt to total capitalization percentage, for each borrower			0.65
Duke Energy Carolinas [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility Size			$ 1,100,000,000
Progress Energy [Member] \| Maximum [Member]
Restrictive Debt Covenants [Abstract]
Debt to total capitalization percentage, for each borrower			0.65
Duke Energy Progress [Member]
Debt Instrument [Line Items]
Debt issuances			$ 450,000,000	1,200,000,000
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid			300,000,000
Other Loans [Abstract]
Other loans outstanding against cash surrender value of life insurance policies			$ 39,000,000	41,000,000
Duke Energy Progress [Member] \| Maximum [Member]
Restrictive Debt Covenants [Abstract]
Debt to total capitalization percentage, for each borrower			0.65
Duke Energy Progress [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility Size			$ 1,000,000,000
Duke Energy Florida [Member]
Debt Instrument [Line Items]
Debt issuances			1,894,000,000
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid			$ 775,000,000	$ 350,000,000
Duke Energy Florida [Member] \| Maximum [Member]
Restrictive Debt Covenants [Abstract]
Debt to total capitalization percentage, for each borrower			0.65
Duke Energy Florida [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility Size			$ 950,000,000
Duke Energy Florida [Member] \| Subsequent Event [Member] \| First Mortgage [Member]
Debt Instrument [Line Items]
Debt issuances	$ 900,000,000
Duke Energy Florida [Member] \| Subsequent Event [Member] \| January 2017 Debt Issuance 1 [Member] \| First Mortgage [Member]
Debt Instrument [Line Items]
Debt issuances	250,000,000
Repayments of Debt	250,000,000
Duke Energy Florida [Member] \| Subsequent Event [Member] \| January 2017 Debt Issuance 2 [Member] \| First Mortgage [Member]
Debt Instrument [Line Items]
Debt issuances	$ 650,000,000
Duke Energy Ohio [Member]
Debt Instrument [Line Items]
Debt issuances			$ 250,000,000
Duke Energy Ohio [Member] \| Maximum [Member]
Restrictive Debt Covenants [Abstract]
Debt to total capitalization percentage, for each borrower			0.65
Duke Energy Ohio [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility Size			$ 450,000,000
Duke Energy Indiana [Member]
Debt Instrument [Line Items]
Debt issuances			500,000,000
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid			$ 149,000,000
Duke Energy Indiana [Member] \| Maximum [Member]
Restrictive Debt Covenants [Abstract]
Debt to total capitalization percentage, for each borrower			0.65
Duke Energy Indiana [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility Size			$ 600,000,000
Duke Energy Indiana [Member] \| May 2016 Debt Maturing May 2046 [Member] \| First Mortgage [Member]
Debt Instrument [Line Items]
Interest rate			3.75%
Debt issuances			$ 500,000,000
Repayments of Debt			$ 325,000,000
Piedmont Natural Gas [Member] \| Maximum [Member]
Restrictive Debt Covenants [Abstract]
Debt to total capitalization percentage, for each borrower			0.70
Piedmont Natural Gas [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility Size			$ 850,000,000
Line Of Credit Facility Optional Additional Expansion Amount			200,000,000
Line of Credit Facility, Current Borrowing Capacity			10,000,000
Piedmont Natural Gas [Member]
Debt Instrument [Line Items]
Facility Size							4,900,000,000
Piedmont Natural Gas [Member] \| August 2016 Term Loan Facility [Member]
Debt Instrument [Line Items]
Facility Size						$ 1,500,000,000
Term Loan Proceeds			750,000,000			$ 750,000,000
Piedmont Natural Gas [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt issuances							$ 3,750,000,000
Swap [Member] \| August 2016 Debt Tranche A Maturing June 2034 [Member] \| Secured Debt [Member] \| Solar Facilities Financing [Member]
Debt Instrument [Line Items]
Derivative, Fixed Interest Rate							1.81%
Swap [Member] \| August 2016 Debt Tranche B Maturing June 2020 [Member] \| Secured Debt [Member] \| Solar Facilities Financing [Member]
Debt Instrument [Line Items]
Derivative, Fixed Interest Rate							1.38%
DEFPF [Member] \| Duke Energy Florida [Member]
Debt Instrument [Line Items]
Debt issuances			1,294,000,000
DEFPF [Member] \| Duke Energy Florida [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Debt issuances								$ 1,294,000,000
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid			649,000,000
USDOJ [Member] \| North Carolina Ash Basins [Member] \| Duke Energy Carolinas [Member]
Debt Instrument [Line Items]
Minimum Master Credit Facility Balance required			250,000,000
USDOJ [Member] \| North Carolina Ash Basins [Member] \| Duke Energy Carolinas [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Minimum Master Credit Facility Balance required			250,000,000
USDOJ [Member] \| North Carolina Ash Basins [Member] \| Duke Energy Progress [Member]
Debt Instrument [Line Items]
Minimum Master Credit Facility Balance required			250,000,000
USDOJ [Member] \| North Carolina Ash Basins [Member] \| Duke Energy Progress [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Minimum Master Credit Facility Balance required			$ 250,000,000