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Debt and Credit Facilities (Summary of Debt and Related Terms) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 4.35% | 4.07%
Unsecured Debt | $ 30,435 | $ 29,585
Secured Debt | 4,202 | 4,116
First mortgage bonds | 37,443 | 32,645
Finance leases | 639 | 764
Tax exempt bonds | 1,331 | 1,331
Notes payable and commercial paper | 4,925 | 4,582
Fair value hedge carrying value adjustment | 32 | (5)
Unamortized debt discount and premium, net | 916 | 1,016
Unamortized debt issuance costs | (383) | (331)
Total debt | 79,540 | 73,703
Short-term notes payable and commercial paper | (4,288) | (3,952)
Current maturities of long-term debt | (2,800) | (3,878)
Total long-term debt | 72,452 | 65,873
Short term obligations classified as long-term debt | $ 937 | $ 937
Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 4.36% | 4.20%
Secured Debt |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 4.23% | 3.70%
First Mortgage Bonds |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 4.18% | 3.89%
Finance Leases |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) |  |
Tax-exempt bonds |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 3.89% | 3.84%
Short term obligations classified as long-term debt | $ 312 | $ 312
Notes Payable And Commercial Paper |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 5.58% | 4.50%
Short term obligations classified as long-term debt | $ 625 | $ 625
Weighted average days to maturity (in days) | 23 days | 15 days
Purchase Accounting Adjustments | Parent Company |  |
Debt Instrument [Line Items] |  |
Unamortized debt issuance costs | $ 25 | $ 27
Purchase Accounting Adjustments | Progress Energy |  |
Debt Instrument [Line Items] |  |
Unamortized debt discount and premium, net | 992 | 1,057
Purchase Accounting Adjustments | Piedmont |  |
Debt Instrument [Line Items] |  |
Unamortized debt discount and premium, net | 69 | 85
Duke Energy Carolinas |  |
Debt Instrument [Line Items] |  |
Unsecured Debt | 1,150 | 1,150
Secured Debt | 1,441 | 1,317
First mortgage bonds | 12,955 | 11,306
Finance leases | 277 | 284
Unamortized debt discount and premium, net | (29) | (21)
Unamortized debt issuance costs | (82) | (70)
Total debt | 16,680 | 15,499
Current maturities of long-term debt | (19) | (1,018)
Total long-term debt | 15,993 | 13,248
Short term obligations classified as long-term debt | 300 | 300
Duke Energy Carolinas | Related Party |  |
Debt Instrument [Line Items] |  |
Money pool/intercompany borrowings | 968 | 1,533
Short-term money pool/intercompany borrowings | 668 | 1,233
Duke Energy Carolinas | Tax-exempt bonds |  |
Debt Instrument [Line Items] |  |
Short term obligations classified as long-term debt |  | 0
Progress Energy |  |
Debt Instrument [Line Items] |  |
Unsecured Debt | 1,800 | 2,600
Secured Debt | 2,379 | 2,383
First mortgage bonds | 18,550 | 16,350
Finance leases | 571 | 628
Tax exempt bonds | 500 | 500
Unamortized debt discount and premium, net | (46) | (40)
Unamortized debt issuance costs | (145) | (132)
Total debt | 24,802 | 23,282
Current maturities of long-term debt | (661) | (697)
Total long-term debt | 23,098 | 21,742
Progress Energy | Related Party |  |
Debt Instrument [Line Items] |  |
Money pool/intercompany borrowings | 1,193 | 993
Short-term money pool/intercompany borrowings | 1,043 | 843
Duke Energy Progress |  |
Debt Instrument [Line Items] |  |
Secured Debt | 1,121 | 1,155
First mortgage bonds | 9,475 | 8,776
Finance leases | 552 | 587
Tax exempt bonds | 500 | 500
Unamortized debt discount and premium, net | (24) | (23)
Unamortized debt issuance costs | (60) | (59)
Total debt | 12,605 | 11,325
Current maturities of long-term debt | (72) | (369)
Total long-term debt | 11,642 | 10,718
Short term obligations classified as long-term debt | 150 | 150
Duke Energy Progress | Related Party |  |
Debt Instrument [Line Items] |  |
Money pool/intercompany borrowings | 1,041 | 389
Short-term money pool/intercompany borrowings | 891 | 238
Duke Energy Progress | Tax-exempt bonds |  |
Debt Instrument [Line Items] |  |
Short term obligations classified as long-term debt |  | 0
Duke Energy Florida |  |
Debt Instrument [Line Items] |  |
Unsecured Debt | 150 | 950
Secured Debt | 1,258 | 1,228
First mortgage bonds | 9,075 | 7,576
Finance leases | 19 | 41
Unamortized debt discount and premium, net | (20) | (16)
Unamortized debt issuance costs | (81) | (70)
Total debt | 10,553 | 10,314
Current maturities of long-term debt | (589) | (328)
Total long-term debt | 9,812 | 9,381
Duke Energy Florida | Related Party |  |
Debt Instrument [Line Items] |  |
Money pool/intercompany borrowings | 152 | 605
Short-term money pool/intercompany borrowings | 152 | 605
Duke Energy Florida | Purchase Accounting Adjustments |  |
Debt Instrument [Line Items] |  |
Finance leases | 63 | 164
Duke Energy Ohio |  |
Debt Instrument [Line Items] |  |
Unsecured Debt | 1,155 | 1,330
First mortgage bonds | 2,300 | 1,850
Tax exempt bonds | 77 | 77
Unamortized debt discount and premium, net | (24) | (25)
Unamortized debt issuance costs | (15) | (12)
Total debt | 4,131 | 3,742
Current maturities of long-term debt |  | (475)
Total long-term debt | 3,518 | 2,770
Short term obligations classified as long-term debt | 52 | 52
Duke Energy Ohio | Related Party |  |
Debt Instrument [Line Items] |  |
Money pool/intercompany borrowings | 638 | 522
Short-term money pool/intercompany borrowings | 613 | 497
Duke Energy Ohio | Tax-exempt bonds |  |
Debt Instrument [Line Items] |  |
Short term obligations classified as long-term debt | 27 | 27
Duke Energy Indiana |  |
Debt Instrument [Line Items] |  |
Unsecured Debt | 393 | 697
First mortgage bonds | 3,638 | 3,138
Finance leases | 9 | 9
Tax exempt bonds | 352 | 352
Unamortized debt discount and premium, net | (16) | (17)
Unamortized debt issuance costs | (25) | (22)
Total debt | 4,758 | 4,742
Current maturities of long-term debt | (4) | (303)
Total long-term debt | 4,498 | 4,004
Short term obligations classified as long-term debt | 435 | 435
Duke Energy Indiana | Related Party |  |
Debt Instrument [Line Items] |  |
Money pool/intercompany borrowings | 407 | 585
Short-term money pool/intercompany borrowings | 256 | 435
Duke Energy Indiana | Tax-exempt bonds |  |
Debt Instrument [Line Items] |  |
Short term obligations classified as long-term debt | 285 | 285
Piedmont |  |
Debt Instrument [Line Items] |  |
Unsecured Debt | 3,695 | 3,390
Unamortized debt discount and premium, net | (8) | (9)
Unamortized debt issuance costs | (19) | (18)
Total debt | 4,206 | 3,877
Current maturities of long-term debt | (40) | (45)
Total long-term debt | 3,628 | 3,318
Piedmont | Related Party |  |
Debt Instrument [Line Items] |  |
Money pool/intercompany borrowings | 538 | 514
Short-term money pool/intercompany borrowings | $ 538 | $ 514

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