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Leases (Supplemental Financial Information) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Assets |  |
Operating lease right-of-use assets, net | $ 1,524 | $ 1,658
Net property, plant and equipment | 797 | 926
Total lease assets | 2,321 | 2,584
Current |  |
Operating | 177 | 208
Finance | 129 | 119
Noncurrent |  |
Operating lease liabilities | 1,340 | 1,432
Finance | 716 | 850
Total lease liabilities | 2,362 | 2,609
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 271 | 285
Operating cash flows from finance leases | 61 | 61
Financing cash flows from finance leases | 119 | 111
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating, lease assets obtained | 116 | 194
Finance | $ 125 | $ 251
Weighted-average remaining lease term (years) |  |
Operating leases | 10 years | 11 years
Finance leases | 13 years | 13 years
Weighted-average discount rate |  |
Operating leases | 3.80% | 3.90%
Finance leases | 8.40% | 8.10%
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Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | us-gaap:OtherLiabilitiesCurrent | us-gaap:OtherLiabilitiesCurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | us-gaap:DebtCurrent | us-gaap:DebtCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | us-gaap:LongTermDebtNoncurrent | us-gaap:LongTermDebtNoncurrent
Duke Energy Carolinas |  |
Assets |  |
Operating lease right-of-use assets, net | $ 110 | $ 123
Net property, plant and equipment | 312 | 198
Total lease assets | 422 | 321
Current |  |
Operating | 20 | 27
Finance | 5 | 7
Noncurrent |  |
Operating lease liabilities | 97 | 102
Finance | 289 | 172
Total lease liabilities | 411 | 308
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 31 | 34
Operating cash flows from finance leases | 30 | 15
Financing cash flows from finance leases | 8 | 6
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating, lease assets obtained | 17 | 44
Finance | $ 125 | $ 76
Weighted-average remaining lease term (years) |  |
Operating leases | 9 years | 9 years
Finance leases | 19 years | 19 years
Weighted-average discount rate |  |
Operating leases | 3.40% | 3.50%
Finance leases | 11.60% | 11.80%
Progress Energy |  |
Assets |  |
Operating lease right-of-use assets, net | $ 690 | $ 788
Net property, plant and equipment | 416 | 443
Total lease assets | 1,106 | 1,231
Current |  |
Operating | 73 | 95
Finance | 26 | 24
Noncurrent |  |
Operating lease liabilities | 623 | 697
Finance | 351 | 381
Total lease liabilities | 1,073 | 1,197
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 124 | 131
Operating cash flows from finance leases | 44 | 42
Financing cash flows from finance leases | $ 24 | 21
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating, lease assets obtained |  | 30
Finance |  | $ 175
Weighted-average remaining lease term (years) |  |
Operating leases | 10 years | 10 years
Finance leases | 15 years | 16 years
Weighted-average discount rate |  |
Operating leases | 3.80% | 3.80%
Finance leases | 11.90% | 11.90%
Duke Energy Progress |  |
Assets |  |
Operating lease right-of-use assets, net | $ 346 | $ 387
Net property, plant and equipment | 297 | 308
Total lease assets | 643 | 695
Current |  |
Operating | 31 | 37
Finance | 7 | 6
Noncurrent |  |
Operating lease liabilities | 323 | 354
Finance | 289 | 301
Total lease liabilities | 650 | 698
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 52 | 53
Operating cash flows from finance leases | 37 | 33
Financing cash flows from finance leases | $ 6 | 5
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating, lease assets obtained |  | 30
Finance |  | $ 175
Weighted-average remaining lease term (years) |  |
Operating leases | 12 years | 12 years
Finance leases | 17 years | 18 years
Weighted-average discount rate |  |
Operating leases | 3.90% | 3.90%
Finance leases | 12.40% | 12.40%
Duke Energy Florida |  |
Assets |  |
Operating lease right-of-use assets, net | $ 344 | $ 401
Net property, plant and equipment | 119 | 135
Total lease assets | 463 | 536
Current |  |
Operating | 42 | 58
Finance | 19 | 18
Noncurrent |  |
Operating lease liabilities | 300 | 343
Finance | 62 | 80
Total lease liabilities | 423 | 499
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 72 | 78
Operating cash flows from finance leases | 7 | 9
Financing cash flows from finance leases | $ 18 | $ 16
Weighted-average remaining lease term (years) |  |
Operating leases | 8 years | 8 years
Finance leases | 11 years | 11 years
Weighted-average discount rate |  |
Operating leases | 3.80% | 3.80%
Finance leases | 8.20% | 8.30%
Duke Energy Ohio |  |
Assets |  |
Operating lease right-of-use assets, net | $ 20 | $ 21
Total lease assets | 20 | 21
Current |  |
Operating | 1 | 1
Noncurrent |  |
Operating lease liabilities | 20 | 21
Total lease liabilities | 21 | 22
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | $ 2 | 2
Financing cash flows from finance leases |  | $ 1
Weighted-average remaining lease term (years) |  |
Operating leases | 17 years | 17 years
Weighted-average discount rate |  |
Operating leases | 4.20% | 4.20%
Finance leases | 0.00% | 0.00%
Duke Energy Indiana |  |
Assets |  |
Operating lease right-of-use assets, net | $ 55 | $ 57
Net property, plant and equipment | 7 | 7
Total lease assets | 62 | 64
Current |  |
Operating | 3 | 3
Noncurrent |  |
Operating lease liabilities | 53 | 55
Finance | 10 | 10
Total lease liabilities | 66 | 68
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 6 | 7
Operating cash flows from finance leases |  | $ 1
Financing cash flows from finance leases | 1 |
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating, lease assets obtained | $ 1 |
Weighted-average remaining lease term (years) |  |
Operating leases | 18 years | 18 years
Finance leases | 25 years | 26 years
Weighted-average discount rate |  |
Operating leases | 4.20% | 4.10%
Finance leases | 11.90% | 11.90%
Piedmont |  |
Assets |  |
Operating lease right-of-use assets, net | $ 20 | $ 24
Total lease assets | 20 | 24
Current |  |
Operating | 4 | 4
Noncurrent |  |
Operating lease liabilities | 19 | 23
Total lease liabilities | 23 | 27
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | $ 5 | 7
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating, lease assets obtained |  | $ 1
Weighted-average remaining lease term (years) |  |
Operating leases | 5 years | 6 years
Weighted-average discount rate |  |
Operating leases | 3.60% | 3.60%
Finance leases | 0.00% | 0.00%

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