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Debt and Credit Facilities (Summary of Debt and Related Terms) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 4.09% | 3.50%
Unsecured Debt | $ 29,585 | $ 24,564
Secured Debt | 5,632 | 5,584
First mortgage bonds | 32,645 | 31,026
Finance leases | 764 | 915
Tax exempt bonds | 1,331 | 360
Notes payable and commercial paper | 4,582 | 3,929
Fair value hedge carrying value adjustment | (5) | 4
Unamortized debt discount and premium, net | 1,016 | 1,119
Unamortized debt issuance costs | (383) | (362)
Total debt | 75,167 | 67,139
Short-term notes payable and commercial paper | (3,952) | (3,304)
Current maturities of long-term debt | (4,154) | (3,387)
Total long-term debt | 67,061 | 60,448
Short term obligations classified as long-term debt | $ 937 | $ 937
Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 4.20% | 3.71%
Secured Debt |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 4.11% | 2.50%
First Mortgage Bonds |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 3.89% | 3.87%
Finance Leases |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 7.90% | 5.81%
Tax Exempt Bonds |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate (as a percent) | 3.84% | 0.65%
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) | 4.50% | 0.35%
Short term obligations classified as long-term debt | $ 625 | $ 625
Weighted average days to maturity (in days) | 15 days | 15 days
Parent Company | Purchase Accounting Adjustments |  |
Debt Instrument [Line Items] |  |
Unamortized debt issuance costs | $ 27 | $ 29
Duke Energy Carolinas |  |
Debt Instrument [Line Items] |  |
Unsecured Debt | 1,150 | 1,150
Secured Debt | 1,317 | 1,094
First mortgage bonds | 11,306 | 10,507
Finance leases | 284 | 289
Money pool/intercompany borrowings | 1,533 | 526
Fair value hedge carrying value adjustment |  | 4
Unamortized debt discount and premium, net | (21) | (21)
Unamortized debt issuance costs | (70) | (67)
Total debt | 15,499 | 13,482
Short-term money pool/intercompany borrowings | (1,233) | (226)
Current maturities of long-term debt | (1,018) | (362)
Total long-term debt | 13,248 | 12,894
Short term obligations classified as long-term debt | 300 | 300
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 | 2,600 | 2,250
Secured Debt | 2,383 | 2,397
First mortgage bonds | 16,350 | 15,450
Finance leases | 628 | 690
Tax exempt bonds | 500 | 48
Money pool/intercompany borrowings | 993 | 2,959
Unamortized debt discount and premium, net | (40) | (34)
Unamortized debt issuance costs | (132) | (128)
Total debt | 23,282 | 23,632
Short-term money pool/intercompany borrowings | (843) | (2,809)
Current maturities of long-term debt | (697) | (1,082)
Total long-term debt | 21,742 | 19,741
Duke Energy Progress |  |
Debt Instrument [Line Items] |  |
Secured Debt | 1,155 | 1,120
First mortgage bonds | 8,776 | 8,375
Finance leases | 587 | 629
Tax exempt bonds | 500 | 48
Money pool/intercompany borrowings | 389 | 322
Unamortized debt discount and premium, net | (23) | (19)
Unamortized debt issuance costs | (59) | (54)
Total debt | 11,325 | 10,421
Short-term money pool/intercompany borrowings | (238) | (172)
Current maturities of long-term debt | (369) | (556)
Total long-term debt | 10,718 | 9,693
Short term obligations classified as long-term debt | 150 | 150
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 | 950 | 150
Secured Debt | 1,228 | 1,278
First mortgage bonds | 7,576 | 7,075
Finance leases | 41 | 61
Money pool/intercompany borrowings | 605 | 199
Unamortized debt discount and premium, net | (16) | (14)
Unamortized debt issuance costs | (70) | (68)
Total debt | 10,314 | 8,681
Short-term money pool/intercompany borrowings | (605) | (199)
Current maturities of long-term debt | (328) | (76)
Total long-term debt | 9,381 | 8,406
Duke Energy Florida | Purchase Accounting Adjustments |  |
Debt Instrument [Line Items] |  |
Finance leases | 164 | 256
Duke Energy Ohio |  |
Debt Instrument [Line Items] |  |
Unsecured Debt | 1,330 | 1,330
First mortgage bonds | 1,850 | 1,850
Tax exempt bonds | 77 | 27
Money pool/intercompany borrowings | 522 | 128
Unamortized debt discount and premium, net | (25) | (27)
Unamortized debt issuance costs | (12) | (13)
Total debt | 3,742 | 3,295
Short-term money pool/intercompany borrowings | (497) | (103)
Current maturities of long-term debt | (475) |
Total long-term debt | 2,770 | 3,192
Short term obligations classified as long-term debt | 52 | 52
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 | 697 | 700
First mortgage bonds | 3,138 | 3,219
Finance leases | 9 | 10
Tax exempt bonds | 352 | 285
Money pool/intercompany borrowings | 585 | 150
Unamortized debt discount and premium, net | (17) | (18)
Unamortized debt issuance costs | (22) | (23)
Total debt | 4,742 | 4,323
Short-term money pool/intercompany borrowings | (435) |
Current maturities of long-term debt | (303) | (84)
Total long-term debt | 4,004 | 4,239
Short term obligations classified as long-term debt | 435 | 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 | 3,390 | 2,990
Money pool/intercompany borrowings | 514 | 518
Unamortized debt discount and premium, net | (9) | (6)
Unamortized debt issuance costs | (18) | (16)
Total debt | 3,877 | 3,486
Short-term money pool/intercompany borrowings | (514) | (518)
Current maturities of long-term debt | (45) | 0
Total long-term debt | 3,318 | 2,968
Progress Energy | Purchase Accounting Adjustments |  |
Debt Instrument [Line Items] |  |
Unamortized debt discount and premium, net | 1,057 | 1,121
Piedmont | Purchase Accounting Adjustments |  |
Debt Instrument [Line Items] |  |
Unamortized debt discount and premium, net | $ 85 | $ 100

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