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Property, Plant and Equipment (Schedule Of Property, Plant and Equipment) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | $ 2,091 | $ 2,072 |
Other buildings and improvements | 4,916 | 4,675 |
Equipment | 2,313 | 2,141 |
Construction in process | 6,102 | 5,726 |
Total property, plant and equipment | 147,654 | 134,458 |
Generation facilities to be retired, net | 246 | 362 |
Total net property, plant and equipment | 102,127 | 91,694 |
Finance lease asset | 952 |  |
Finance lease accumulated amortization | (6) |  |
Capitalized leases |  | 1,237 |
Accumulated amortization on capitalized leases |  | 61 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | $ 159 | $ 161 | $ 128
Minimum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other, estimated useful life, in years | 2 years | 3 years |
Equipment, estimated useful life, years | 3 years | 3 years |
Maximum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other, estimated useful life, in years | 40 years | 40 years |
Equipment, estimated useful life, years | 25 years | 55 years |
Nuclear fuel |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Nuclear fuel | $ 3,253 | $ 3,460 |
Accumulated depreciation and amortization | (1,807) | (1,947) |
VIE |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Total property, plant and equipment | 5,747 | 4,007 |
Accumulated depreciation and amortization | (1,041) | (698) |
Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (43,419) | (41,079) |
Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | $ 111,739 | $ 100,706 |
Regulated | Electric generation, distribution and transmission | Minimum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution, estimated useful life, in years | 15 years | 15 years |
Regulated | Electric generation, distribution and transmission | Maximum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution, estimated useful life, in years | 100 years | 100 years |
Regulated | Natural gas transmission and distribution |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | $ 9,839 | $ 8,808 |
Regulated | Natural gas transmission and distribution | Minimum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution, estimated useful life, in years | 4 years | 12 years |
Regulated | Natural gas transmission and distribution | Maximum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution, estimated useful life, in years | 73 years | 80 years |
Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | $ 1,810 | $ 1,966 |
Regulated | Other buildings and improvements | Minimum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other, estimated useful life, in years | 23 years | 24 years |
Regulated | Other buildings and improvements | Maximum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other, estimated useful life, in years | 90 years | 90 years |
Nonregulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | $ (2,354) | $ (2,047) |
Finance lease accumulated amortization | (20) |  |
Nonregulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | $ 5,103 | $ 4,410 |
Nonregulated | Electric generation, distribution and transmission | Minimum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution, estimated useful life, in years | 5 years | 5 years |
Nonregulated | Electric generation, distribution and transmission | Maximum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution, estimated useful life, in years | 30 years | 30 years |
Nonregulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | $ 488 | $ 494 |
Nonregulated | Other buildings and improvements | Minimum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other, estimated useful life, in years | 25 years | 25 years |
Nonregulated | Other buildings and improvements | Maximum |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other, estimated useful life, in years | 35 years | 35 years |
Duke Energy Carolinas |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | $ 520 | $ 472 |
Other buildings and improvements | 1,139 | 1,077 |
Equipment | 546 | 467 |
Construction in process | 1,389 | 1,678 |
Total property, plant and equipment | 48,922 | 44,741 |
Total net property, plant and equipment | 32,397 | 29,245 |
Finance lease asset | 211 |  |
Finance lease accumulated amortization | (13) |  |
Capitalized leases |  | 135 |
Accumulated amortization on capitalized leases |  | 12 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 30 | 35 | 45
Duke Energy Carolinas | Nuclear fuel |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Nuclear fuel | 1,891 | 1,898 |
Accumulated depreciation and amortization | (1,082) | (1,087) |
Duke Energy Carolinas | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (16,525) | (15,496) |
Duke Energy Carolinas | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 42,723 | 38,468 |
Duke Energy Carolinas | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 714 | 681 |
Progress Energy |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 884 | 868 |
Other buildings and improvements | 1,467 | 1,354 |
Equipment | 665 | 565 |
Construction in process | 2,149 | 2,515 |
Total property, plant and equipment | 55,070 | 50,260 |
Generation facilities to be retired, net | 246 | 362 |
Total net property, plant and equipment | 38,157 | 34,224 |
Finance lease asset | 443 |  |
Finance lease accumulated amortization | (143) |  |
Capitalized leases |  | 257 |
Accumulated amortization on capitalized leases |  | 131 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 31 | 51 | 45
Progress Energy | Nuclear fuel |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Nuclear fuel | 1,362 | 1,562 |
Accumulated depreciation and amortization | (725) | (860) |
Progress Energy | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (17,159) | (16,398) |
Progress Energy | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 48,142 | 42,760 |
Progress Energy | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 401 | 636 |
Duke Energy Progress |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 449 | 445 |
Other buildings and improvements | 1,046 | 952 |
Equipment | 452 | 399 |
Construction in process | 1,114 | 1,659 |
Total property, plant and equipment | 34,603 | 31,459 |
Generation facilities to be retired, net | 246 | 362 |
Total net property, plant and equipment | 22,934 | 20,398 |
Finance lease asset | 308 |  |
Finance lease accumulated amortization | (17) |  |
Capitalized leases |  | 137 |
Accumulated amortization on capitalized leases |  | 14 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 28 | 26 | 21
Duke Energy Progress | Nuclear fuel |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Nuclear fuel | 1,362 | 1,562 |
Accumulated depreciation and amortization | (725) | (860) |
Duke Energy Progress | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (11,915) | (11,423) |
Duke Energy Progress | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 30,018 | 26,147 |
Duke Energy Progress | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 162 | 295 |
Duke Energy Florida |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 435 | 423 |
Other buildings and improvements | 411 | 393 |
Equipment | 213 | 166 |
Construction in process | 1,035 | 856 |
Total property, plant and equipment | 20,457 | 18,792 |
Total net property, plant and equipment | 15,221 | 13,824 |
Finance lease asset | 135 |  |
Finance lease accumulated amortization | (126) |  |
Capitalized leases |  | 120 |
Accumulated amortization on capitalized leases |  | 117 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 3 | 25 | 24
Duke Energy Florida | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (5,236) | (4,968) |
Duke Energy Florida | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 18,124 | 16,613 |
Duke Energy Florida | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 239 | 341 |
Duke Energy Ohio |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 150 | 136 |
Other buildings and improvements | 269 | 257 |
Equipment | 319 | 384 |
Construction in process | 504 | 412 |
Total property, plant and equipment | 10,241 | 9,360 |
Total net property, plant and equipment | 7,398 | 6,643 |
Capitalized leases |  | 73 |
Accumulated amortization on capitalized leases |  | 20 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 22 | 17 | 10
Duke Energy Ohio | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (2,843) | (2,717) |
Duke Energy Ohio | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 5,838 | 5,182 |
Duke Energy Ohio | Regulated | Natural gas transmission and distribution |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 2,892 | 2,719 |
Duke Energy Ohio | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 269 | 270 |
Duke Energy Indiana |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 117 | 116 |
Other buildings and improvements | 292 | 279 |
Equipment | 205 | 178 |
Construction in process | 381 | 325 |
Total property, plant and equipment | 16,305 | 15,443 |
Total net property, plant and equipment | 11,072 | 10,529 |
Finance lease asset | 10 |  |
Finance lease accumulated amortization | (3) |  |
Capitalized leases |  | 35 |
Accumulated amortization on capitalized leases |  | 10 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 26 | 27 | 9
Duke Energy Indiana | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (5,233) | (4,914) |
Duke Energy Indiana | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 15,032 | 14,292 |
Duke Energy Indiana | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 278 | 253 |
Piedmont |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 388 | 448 |
Other buildings and improvements | 304 | 300 |
Equipment | 128 | 141 |
Construction in process | 531 | 382 |
Total property, plant and equipment | 8,446 | 7,486 |
Total net property, plant and equipment | 6,765 | 5,911 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 26 | 17 | $ 12
Piedmont | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (1,681) | (1,575) |
Piedmont | Regulated | Natural gas transmission and distribution |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 6,947 | 6,089 |
Piedmont | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | $ 148 | $ 126 |

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