Leases (Supplemental Financial Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Assets
Operating lease right-of-use assets, net	$ 1,042	$ 1,136
Net property, plant and equipment	810	950
Total lease assets	1,852	2,086
Current
Operating	179	184
Finance	153	151
Noncurrent
Operating	876	940
Finance	611	764
Total lease liabilities	1,819	2,039
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	230	245
Operating cash flows from finance leases	50	55
Financing cash flows from finance leases	151	219
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	$ 111	182
Finance		$ 322
Weighted average remaining lease term (years)
Operating leases	8 years	8 years
Finance leases	10 years	10 years
Weighted-average discount rate
Operating leases	3.40%	3.50%
Finance leases	7.70%	7.30%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Public utilities, property, plant and equipment, net	Public utilities, property, plant and equipment, net
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current Liabilities: Other	Current Liabilities: Other
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current maturities of long-term debt	Current maturities of long-term debt
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-Term Debt	Long-Term Debt
Duke Energy Carolinas
Assets
Operating lease right-of-use assets, net	$ 78	$ 92
Net property, plant and equipment	284	302
Total lease assets	362	394
Current
Operating	14	22
Finance	7	6
Noncurrent
Operating	83	78
Finance	277	283
Total lease liabilities	381	389
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	24	25
Operating cash flows from finance leases	32	33
Financing cash flows from finance leases	6	5
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	$ 10	$ 4
Weighted average remaining lease term (years)
Operating leases	10 years	9 years
Finance leases	17 years	18 years
Weighted-average discount rate
Operating leases	3.80%	3.50%
Finance leases	11.50%	11.60%
Progress Energy
Assets
Operating lease right-of-use assets, net	$ 628	$ 691
Net property, plant and equipment	674	729
Total lease assets	1,302	1,420
Current
Operating	96	94
Finance	57	61
Noncurrent
Operating	546	606
Finance	571	629
Total lease liabilities	1,270	1,390
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	118	117
Operating cash flows from finance leases	49	48
Financing cash flows from finance leases	$ 61	37
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating		99
Finance		$ 322
Weighted average remaining lease term (years)
Operating leases	8 years	8 years
Finance leases	12 years	13 years
Weighted-average discount rate
Operating leases	3.60%	3.60%
Finance leases	9.10%	9.00%
Duke Energy Progress
Assets
Operating lease right-of-use assets, net	$ 370	$ 389
Net property, plant and equipment	590	627
Total lease assets	960	1,016
Current
Operating	51	50
Finance	35	41
Noncurrent
Operating	335	350
Finance	552	588
Total lease liabilities	973	1,029
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	63	62
Operating cash flows from finance leases	45	42
Financing cash flows from finance leases	$ 41	18
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating		99
Finance		$ 322
Weighted average remaining lease term (years)
Operating leases	9 years	10 years
Finance leases	12 years	13 years
Weighted-average discount rate
Operating leases	3.50%	3.40%
Finance leases	9.10%	9.00%
Duke Energy Florida
Assets
Operating lease right-of-use assets, net	$ 258	$ 302
Net property, plant and equipment	84	102
Total lease assets	342	404
Current
Operating	45	44
Finance	22	20
Noncurrent
Operating	211	256
Finance	19	41
Total lease liabilities	297	361
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	55	55
Operating cash flows from finance leases	4	6
Financing cash flows from finance leases	$ 20	$ 19
Weighted average remaining lease term (years)
Operating leases	6 years	7 years
Finance leases	12 years	11 years
Weighted-average discount rate
Operating leases	3.80%	3.80%
Finance leases	8.00%	8.20%
Duke Energy Ohio
Assets
Operating lease right-of-use assets, net	$ 18	$ 19
Total lease assets	18	19
Current
Operating	1	1
Noncurrent
Operating	17	18
Total lease liabilities	18	19
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 2	$ 2
Weighted average remaining lease term (years)
Operating leases	15 years	16 years
Weighted-average discount rate
Operating leases	4.20%	4.20%
Duke Energy Indiana
Assets
Operating lease right-of-use assets, net	$ 49	$ 53
Net property, plant and equipment	6	7
Total lease assets	55	60
Current
Operating	4	4
Noncurrent
Operating	47	50
Finance	9	10
Total lease liabilities	60	64
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	6	6
Operating cash flows from finance leases	$ 1
Financing cash flows from finance leases		$ 1
Weighted average remaining lease term (years)
Operating leases	15 years	16 years
Finance leases	23 years	24 years
Weighted-average discount rate
Operating leases	4.00%	4.10%
Finance leases	11.90%	11.90%
Piedmont
Assets
Operating lease right-of-use assets, net	$ 4	$ 16
Total lease assets	4	16
Current
Operating		5
Noncurrent
Operating	13	14
Total lease liabilities	13	19
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 4	$ 5
Weighted average remaining lease term (years)
Operating leases	1 year	4 years
Weighted-average discount rate
Operating leases	3.30%	3.60%