Condensed Consolidated Statements of Cash Flows - Duke Energy Piedmont - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	$ 1,764	$ 1,757
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Equity in earnings (losses) of unconsolidated affiliates	(61)	8
Provision for rate refunds	(65)	(13)
(Increase) decrease in
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Payments to Acquire Interest in Subsidiaries and Affiliates	(32)	(21)
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Payments for the redemption of long-term debt	(3,147)	(2,002)
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	1,264	990
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	213	199
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	111	101
Equity component of AFUDC	(4)	(14)
Losses on sale of other assets	(4)
Impairment of assets and other charges		5
Deferred income taxes	(4)	3
Equity in earnings (losses) of unconsolidated affiliates	(4)	(4)
Provision for rate refunds	(3)	(3)
(Increase) decrease in
Receivables	168	137
Inventory	40	26
Other current assets	(63)	30
Increase (decrease) in
Accounts payable	31	(70)
Accounts payable to affiliated companies	4	(35)
Taxes accrued	(32)	3
Other current liabilities	44	(30)
Other assets	(2)	6
Other liabilities	(1)	(2)
Net cash provided by operating activities	494	352
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(385)	(411)
Payments to Acquire Interest in Subsidiaries and Affiliates	(8)
Return of investment capital		1
Other	(9)	(17)
Net cash used in investing activities	(402)	(427)
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	(485)	(437)
Capital contributions from parent		325
Other	(1)
Net cash provided by financing activities	(92)	75
Significant non-cash transactions:
Accrued capital expenditures	$ 124	$ 111