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Leases (Operating Lease Right-of-use Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Jan. 01, 2019
--- | --- | ---
Lessee, Lease, Description [Line Items] |  |
ROU assets | $ 1,658 | $ 1,750
Operating lease liabilities – current | 208 | 205
Operating lease liabilities – noncurrent | 1,432 | 1,504
Duke Energy Carolinas |  |
Lessee, Lease, Description [Line Items] |  |
ROU assets | 123 | 153
Operating lease liabilities – current | 27 | 28
Operating lease liabilities – noncurrent | 102 | 127
Progress Energy |  |
Lessee, Lease, Description [Line Items] |  |
ROU assets | 788 | 863
Operating lease liabilities – current | 95 | 96
Operating lease liabilities – noncurrent | 697 | 766
Duke Energy Progress |  |
Lessee, Lease, Description [Line Items] |  |
ROU assets | 387 | 407
Operating lease liabilities – current | 37 | 35
Operating lease liabilities – noncurrent | 354 | 371
Duke Energy Florida |  |
Lessee, Lease, Description [Line Items] |  |
ROU assets | 401 | 456
Operating lease liabilities – current | 58 | 61
Operating lease liabilities – noncurrent | 343 | 395
Duke Energy Ohio |  |
Lessee, Lease, Description [Line Items] |  |
ROU assets | 21 | 23
Operating lease liabilities – current | 1 | 1
Operating lease liabilities – noncurrent | 21 | 22
Duke Energy Indiana |  |
Lessee, Lease, Description [Line Items] |  |
ROU assets | 57 | 61
Operating lease liabilities – current | 3 | 4
Operating lease liabilities – noncurrent | 55 | 58
Piedmont |  |
Lessee, Lease, Description [Line Items] |  |
ROU assets | 24 | 26
Operating lease liabilities – current | 4 | 4
Operating lease liabilities – noncurrent | $ 23 | $ 25

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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