Condensed Consolidated Statements of Cash Flows - Duke Energy Piedmont - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation		$ 3,186	$ 3,162
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		4,414	4,189
Equity component of AFUDC		(151)	(126)
Impairment of assets and other charges		202	342
Deferred income taxes		209	206
Equity in earnings of unconsolidated affiliates		(87)	(14)
Contributions to qualified pension plans		(58)
Payments for asset retirement obligations		(418)	(389)
Provision for rate refunds		(97)	(41)
(Increase) decrease in
Receivables		(356)	(167)
Inventory		(290)	268
Other current assets(a)	[1]	(2,403)	(643)
Increase (decrease) in
Accounts payable		504	(146)
Taxes accrued		206	431
Other current liabilities		263	10
Other assets		(84)	199
Other liabilities		188	77
Net cash provided by operating activities		5,188	7,227
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(8,148)	(7,089)
Payments to Acquire Interest in Subsidiaries and Affiliates		(37)	(30)
Other		(517)	(269)
Net cash used in investing activities		(8,630)	(8,200)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		9,466	6,379
Payments for the redemption of long-term debt		(3,803)	(3,696)
Other		(124)	(21)
Net cash provided by financing activities		3,551	1,160
Net increase in cash, cash equivalents and restricted cash		109	187
Cash, cash equivalents and restricted cash at beginning of period		520	556
Cash, cash equivalents and restricted cash at end of period		629	743
Significant non-cash transactions:
Accrued capital expenditures		1,387	998
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation		180	175
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		168	152
Equity component of AFUDC		(7)	(19)
Impairment of assets and other charges		1	10
Deferred income taxes		13	10
Equity in earnings of unconsolidated affiliates		(5)	(7)
Contributions to qualified pension plans		(2)
Provision for rate refunds		(3)	(3)
(Increase) decrease in
Receivables		198	151
Receivables from affiliated companies		1	(1)
Inventory		(26)
Other current assets(a)		(91)	7
Increase (decrease) in
Accounts payable		24	(55)
Accounts payable to affiliated companies		(5)	(48)
Taxes accrued		(18)	17
Other current liabilities		23	(32)
Other assets		(8)	3
Other liabilities		(3)	2
Net cash provided by operating activities		440	362
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(598)	(628)
Payments to Acquire Interest in Subsidiaries and Affiliates		(8)	(9)
Return of investment capital			1
Other		(17)	(23)
Net cash used in investing activities		(623)	(659)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		394	347
Payments for the redemption of long-term debt			(160)
Notes receivable from affiliated companies		(210)	(215)
Capital contributions from parent			325
Other		(1)
Net cash provided by financing activities		183	297
Significant non-cash transactions:
Accrued capital expenditures		$ 163	$ 115

[1] Includes approximately $2.2 billion of under-collected deferred fuel regulatory assets for the nine months ended September 30, 2022