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Leases (Supplemental Financial Information) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 | Jan. 01, 2019
Assets |  |
Operating | $ 1,735 | $ 1,750
Finance | 1,013 |
Total lease assets | 2,748 |
Current |  |
Operating | 213 | 205
Finance | 115 |
Noncurrent |  |
Operating | 1,502 | 1,504
Finance | 907 |
Total lease liabilities | 2,737 |
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 136 |
Operating cash flows from finance leases | 37 |
Financing cash flows from finance leases | 56 |
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating | 78 |
Finance | $ 175 |
Weighted-average remaining lease term (years) |  |
Operating leases | 11 years |
Finance leases | 16 years |
Weighted-average discount rate |  |
Operating leases | 3.90% |
Finance leases | 7.90% |
Duke Energy Carolinas [Member] |  |
Assets |  |
Operating | $ 141 | 153
Finance | 122 |
Total lease assets | 263 |
Current |  |
Operating | 27 | 28
Finance | 6 |
Noncurrent |  |
Operating | 117 | 127
Finance | 101 |
Total lease liabilities | 251 |
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 15 |
Operating cash flows from finance leases | 7 |
Financing cash flows from finance leases | 2 |
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating | $ 2 |
Weighted-average remaining lease term (years) |  |
Operating leases | 9 years |
Finance leases | 19 years |
Weighted-average discount rate |  |
Operating leases | 3.70% |
Finance leases | 12.90% |
Progress Energy [Member] |  |
Assets |  |
Operating | $ 839 | 863
Finance | 423 |
Total lease assets | 1,262 |
Current |  |
Operating | 100 | 96
Finance | 23 |
Noncurrent |  |
Operating | 747 | 766
Finance | 394 |
Total lease liabilities | 1,264 |
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 60 |
Operating cash flows from finance leases | 19 |
Financing cash flows from finance leases | 8 |
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating | 30 |
Finance | $ 175 |
Weighted-average remaining lease term (years) |  |
Operating leases | 10 years |
Finance leases | 17 years |
Weighted-average discount rate |  |
Operating leases | 3.80% |
Finance leases | 11.80% |
Duke Energy Progress [Member] |  |
Assets |  |
Operating | $ 407 | 407
Finance | 309 |
Total lease assets | 716 |
Current |  |
Operating | 36 | 35
Finance | 6 |
Noncurrent |  |
Operating | 377 | 371
Finance | 304 |
Total lease liabilities | 723 |
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 23 |
Operating cash flows from finance leases | 14 |
Financing cash flows from finance leases | 2 |
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating | 30 |
Finance | $ 175 |
Weighted-average remaining lease term (years) |  |
Operating leases | 12 years |
Finance leases | 18 years |
Weighted-average discount rate |  |
Operating leases | 3.80% |
Finance leases | 12.40% |
Duke Energy Florida [Member] |  |
Assets |  |
Operating | $ 432 | 456
Finance | 114 |
Total lease assets | 546 |
Current |  |
Operating | 64 | 61
Finance | 17 |
Noncurrent |  |
Operating | 370 | 395
Finance | 90 |
Total lease liabilities | 541 |
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 37 |
Operating cash flows from finance leases | 5 |
Financing cash flows from finance leases | $ 6 |
Weighted-average remaining lease term (years) |  |
Operating leases | 9 years |
Finance leases | 12 years |
Weighted-average discount rate |  |
Operating leases | 3.70% |
Finance leases | 8.30% |
Duke Energy Ohio [Member] |  |
Assets |  |
Operating | $ 22 | 23
Total lease assets | 22 |
Current |  |
Operating | 1 | 1
Finance | 0 |
Noncurrent |  |
Operating | 21 | 22
Total lease liabilities | 22 |
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 1 |
Financing cash flows from finance leases | $ 1 |
Weighted-average remaining lease term (years) |  |
Operating leases | 18 years |
Finance leases | 0 years |
Weighted-average discount rate |  |
Operating leases | 4.20% |
Finance leases | 0.00% |
Duke Energy Indiana [Member] |  |
Assets |  |
Operating | $ 60 | 61
Finance | 10 |
Total lease assets | 70 |
Current |  |
Operating | 4 | 4
Noncurrent |  |
Operating | 56 | 58
Finance | 10 |
Total lease liabilities | 70 |
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 3 |
Operating cash flows from finance leases | $ 1 |
Weighted-average remaining lease term (years) |  |
Operating leases | 19 years |
Finance leases | 27 years |
Weighted-average discount rate |  |
Operating leases | 4.10% |
Finance leases | 11.90% |
Piedmont Natural Gas [Member] |  |
Assets |  |
Operating | $ 26 | 26
Total lease assets | 26 |
Current |  |
Operating | 4 | 4
Noncurrent |  |
Operating | 25 | $ 25
Total lease liabilities | 29 |
Cash paid for amounts included in the measurement of lease liabilities(a) |  |
Operating cash flows from operating leases | 5 |
Lease assets obtained in exchange for new lease liabilities (non-cash) |  |
Operating | $ 1 |
Weighted-average remaining lease term (years) |  |
Operating leases | 6 years |
Finance leases | 0 years |
Weighted-average discount rate |  |
Operating leases | 3.60% |

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