Leases (Finance Lease Maturities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Finance Lease, Liability, Payment, Due
2022	$ 201
2023	198
2024	143
2025	76
2026	77
Thereafter	658
Total finance lease payments	1,353
Less: amounts representing interest	(438)
Total finance lease liabilities	915	$ 845
Duke Energy Carolinas
Finance Lease, Liability, Payment, Due
2022	38
2023	38
2024	38
2025	38
2026	38
Thereafter	464
Total finance lease payments	654
Less: amounts representing interest	(365)
Total finance lease liabilities	289	294
Progress Energy
Finance Lease, Liability, Payment, Due
2022	111
2023	103
2024	88
2025	85
2026	86
Thereafter	637
Total finance lease payments	1,110
Less: amounts representing interest	(420)
Total finance lease liabilities	690	377
Duke Energy Progress
Finance Lease, Liability, Payment, Due
2022	86
2023	78
2024	79
2025	80
2026	81
Thereafter	636
Total finance lease payments	1,040
Less: amounts representing interest	(411)
Total finance lease liabilities	629	296
Duke Energy Florida
Finance Lease, Liability, Payment, Due
2022	25
2023	25
2024	9
2025	5
2026	5
Thereafter	1
Total finance lease payments	70
Less: amounts representing interest	(9)
Total finance lease liabilities	61	81
Duke Energy Indiana
Finance Lease, Liability, Payment, Due
2022	1
2023	1
2024	1
2025	1
2026	1
Thereafter	24
Total finance lease payments	29
Less: amounts representing interest	(19)
Total finance lease liabilities	$ 10	$ 10

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