Organization and Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Cash Received and Allocated Losses from Subsidiaries, Noncontrolling Interest

The following table presents allocated losses to noncontrolling interest for the three and nine months ended September 30, 2021, and 2020.

	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2021		2020		2021		2020
Noncontrolling Interest Allocation of Income
Allocated losses to noncontrolling tax equity members utilizing the HLBV method	$	119	$	59	$	217	$	187
Allocated losses to noncontrolling members based on pro rata shares of ownership	10		11		30		21
Total Noncontrolling Interest Allocated Losses	$	129	$	70	$	247	$	208

Schedule of Cash, Cash Equivalents and Restricted Cash

The following table presents the components of cash, cash equivalents and restricted cash included in the Condensed Consolidated Balance Sheets.

	September 30, 2021						December 31, 2020
					Duke						Duke
	Duke		Progress		Energy		Duke		Progress		Energy
	Energy		Energy		Florida		Energy		Energy		Florida
Current Assets
Cash and cash equivalents	$	548	$	102	$	40	$	259	$	59	$	11
Other	194		17		17		194		39		39
Other Noncurrent Assets
Other	1		—		—		103		102		—
Total cash, cash equivalents and restricted cash	$	743	$	119	$	57	$	556	$	200	$	50

Schedule of Utility Inventory

The components of inventory are presented in the tables below.

	September 30, 2021
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Materials and supplies	$	2,317	$	779	$	1,009	$	674	$	336	$	85	$	305	$	11
Coal	312		152		89		45		43		10		61		—
Natural gas, oil and other fuel	271		38		157		96		60		19		1		57
Total inventory	$	2,900	$	969	$	1,255	$	815	$	439	$	114	$	367	$	68

	December 31, 2020
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Materials and supplies	$	2,312	$	785	$	999	$	673	$	325	$	78	$	307	$	12
Coal	561		186		193		131		63		16		165		—
Natural gas, oil and other fuel	294		39		183		107		76		16		1		56
Total inventory	$	3,167	$	1,010	$	1,375	$	911	$	464	$	110	$	473	$	68

Schedule of New Accounting Pronouncements

Duke Energy recorded an adjustment for the cumulative effect of a change in accounting principle due to the adoption of this standard on January 1, 2020, as shown in the table below:

	January 1, 2020
			Duke				Duke		Duke
	Duke		Energy		Progress		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Piedmont
Total pretax impact to Retained Earnings	$	120	$	16	$	2	$	1	$	1	$	1