XML 50 R8.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Condensed Consolidated Statements of Changes in Equity (Parenthetical) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2017 USD ($)
Progress Energy [Member] |
Dividend to parent related to a legal entity restructuring | $ 547

X
- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in payment-in-kind (PIK). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_DividendsCommonStockPaidinkind
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=duk_ProgressEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |