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Employee Benefit Plans (Expected Benefit Payments) (Details) $ in Millions | Dec. 31, 2021 USD ($)
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Pension Plan | Qualified Plan |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | $ 652
2023 | 653
2024 | 645
2025 | 632
2026 | 605
2027-2031 | 2,705
Pension Plan | Duke Energy Carolinas | Qualified Plan |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 174
2023 | 173
2024 | 171
2025 | 168
2026 | 155
2027-2031 | 655
Pension Plan | Progress Energy | Qualified Plan |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 177
2023 | 180
2024 | 181
2025 | 180
2026 | 176
2027-2031 | 818
Pension Plan | Duke Energy Progress | Qualified Plan |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 95
2023 | 97
2024 | 96
2025 | 94
2026 | 90
2027-2031 | 389
Pension Plan | Duke Energy Florida | Qualified Plan |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 81
2023 | 82
2024 | 84
2025 | 85
2026 | 86
2027-2031 | 426
Pension Plan | Duke Energy Ohio | Qualified Plan |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 37
2023 | 36
2024 | 35
2025 | 34
2026 | 33
2027-2031 | 149
Pension Plan | Duke Energy Indiana | Qualified Plan |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 48
2023 | 48
2024 | 47
2025 | 47
2026 | 45
2027-2031 | 218
Pension Plan | Piedmont | Qualified Plan |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 27
2023 | 24
2024 | 23
2025 | 20
2026 | 21
2027-2031 | 85
Other Post-Retirement Benefit Plans |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 70
2023 | 62
2024 | 58
2025 | 54
2026 | 50
2027-2031 | 207
Other Post-Retirement Benefit Plans | Duke Energy Carolinas |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 17
2023 | 15
2024 | 14
2025 | 13
2026 | 12
2027-2031 | 50
Other Post-Retirement Benefit Plans | Progress Energy |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 26
2023 | 25
2024 | 23
2025 | 22
2026 | 21
2027-2031 | 87
Other Post-Retirement Benefit Plans | Duke Energy Progress |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 15
2023 | 14
2024 | 13
2025 | 12
2026 | 12
2027-2031 | 49
Other Post-Retirement Benefit Plans | Duke Energy Florida |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 12
2023 | 11
2024 | 11
2025 | 10
2026 | 9
2027-2031 | 38
Other Post-Retirement Benefit Plans | Duke Energy Ohio |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 3
2023 | 3
2024 | 3
2025 | 2
2026 | 2
2027-2031 | 8
Other Post-Retirement Benefit Plans | Duke Energy Indiana |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 7
2023 | 6
2024 | 6
2025 | 5
2026 | 5
2027-2031 | 19
Other Post-Retirement Benefit Plans | Piedmont |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2022 | 2
2023 | 2
2024 | 2
2025 | 2
2026 | 2
2027-2031 | $ 10

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