Leases (Supplemental Financial Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Assets
Operating lease right-of-use assets, net	$ 1,148	$ 1,092
Net property, plant and equipment	645	687
Total lease assets	1,793	1,779
Current
Operating	208	188
Finance	46	115
Noncurrent
Operating	957	917
Finance	524	524
Total lease liabilities	1,735	1,744
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	250	228
Operating cash flows from finance leases	41	46
Financing cash flows from finance leases	113	160
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	322	286
Finance	$ 81	$ 36
Weighted average remaining lease term (years)
Operating leases	8 years	9 years
Finance leases	11 years	11 years
Weighted-average discount rate (as a percent)
Operating leases	4.30%	3.10%
Finance leases	8.40%	8.50%
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
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Operating lease liabilities	Operating lease liabilities
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	$ 98	$ 78
Net property, plant and equipment	252	268
Total lease assets	350	346
Current
Operating	20	15
Finance	8	8
Noncurrent
Operating	87	75
Finance	262	269
Total lease liabilities	377	367
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	24	18
Operating cash flows from finance leases	31	31
Financing cash flows from finance leases	7	7
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	50	$ 14
Finance	$ 1
Weighted average remaining lease term (years)
Operating leases	9 years	10 years
Finance leases	15 years	16 years
Weighted-average discount rate (as a percent)
Operating leases	4.30%	4.00%
Finance leases	11.50%	11.50%
Progress Energy
Assets
Operating lease right-of-use assets, net	$ 625	$ 617
Net property, plant and equipment	620	615
Total lease assets	1,245	1,232
Current
Operating	97	94
Finance	48	46
Noncurrent
Operating	557	544
Finance	533	525
Total lease liabilities	1,235	1,209
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	122	123
Operating cash flows from finance leases	44	45
Financing cash flows from finance leases	46	57
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	43	$ 92
Finance	$ 55
Weighted average remaining lease term (years)
Operating leases	9 years	10 years
Finance leases	11 years	11 years
Weighted-average discount rate (as a percent)
Operating leases	4.00%	3.80%
Finance leases	8.90%	9.10%
Duke Energy Progress
Assets
Operating lease right-of-use assets, net	$ 348	$ 318
Net property, plant and equipment	512	552
Total lease assets	860	870
Current
Operating	42	45
Finance	41	38
Noncurrent
Operating	332	293
Finance	474	514
Total lease liabilities	889	890
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	57	64
Operating cash flows from finance leases	41	43
Financing cash flows from finance leases	38	35
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	$ 3	$ 1
Weighted average remaining lease term (years)
Operating leases	8 years	9 years
Finance leases	10 years	11 years
Weighted-average discount rate (as a percent)
Operating leases	3.90%	3.60%
Finance leases	9.20%	9.20%
Duke Energy Florida
Assets
Operating lease right-of-use assets, net	$ 277	$ 299
Net property, plant and equipment	108	63
Total lease assets	385	362
Current
Operating	55	49
Finance	7	8
Noncurrent
Operating	225	251
Finance	59	11
Total lease liabilities	346	319
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	65	59
Operating cash flows from finance leases	3	2
Financing cash flows from finance leases	8	22
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	40	$ 91
Finance	$ 55
Weighted average remaining lease term (years)
Operating leases	11 years	11 years
Finance leases	15 years	18 years
Weighted-average discount rate (as a percent)
Operating leases	4.20%	4.00%
Finance leases	5.90%	7.60%
Duke Energy Ohio
Assets
Operating lease right-of-use assets, net	$ 6	$ 16
Total lease assets	6	16
Current
Operating	1	1
Noncurrent
Operating	6	16
Total lease liabilities	7	17
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 1	2
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating		$ 2
Weighted average remaining lease term (years)
Operating leases	11 years	13 years
Weighted-average discount rate (as a percent)
Operating leases	4.10%	4.20%
Duke Energy Indiana
Assets
Operating lease right-of-use assets, net	$ 37	$ 50
Net property, plant and equipment	6	6
Total lease assets	43	56
Current
Operating	6	6
Noncurrent
Operating	33	46
Finance	10	9
Total lease liabilities	49	61
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	8	7
Operating cash flows from finance leases	1	1
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	7	$ 6
Finance	$ 1
Weighted average remaining lease term (years)
Operating leases	11 years	13 years
Finance leases	20 years	22 years
Weighted-average discount rate (as a percent)
Operating leases	4.00%	3.90%
Finance leases	11.70%	11.90%
Piedmont
Assets
Operating lease right-of-use assets, net	$ 4	$ 4
Total lease assets	4	4
Current
Operating	1
Noncurrent
Operating	7	10
Total lease liabilities	8	10
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	1
Lease assets obtained in exchange for new lease liabilities (non-cash)
Operating	$ 3	$ 2
Weighted average remaining lease term (years)
Operating leases	4 years	4 years
Finance leases		3 years
Weighted-average discount rate (as a percent)
Operating leases	3.90%	2.40%
Finance leases		5.40%