Organization and Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

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

The following table presents cash received for the sale of noncontrolling interest and allocated losses to noncontrolling interest for the three months ended March 31, 2021, and 2020.

	Three Months Ended March 31,
(in millions)	2021		2020
Noncontrolling Interest Capital Contributions
Cash received for the sale of noncontrolling interest to tax equity members	$	303	$	103
Cash received for the sale of noncontrolling interest to pro rata share members	—		—
Total Noncontrolling Interest Capital Contributions	303		103
Noncontrolling Interest Allocation of Income
Allocated losses to noncontrolling tax equity members utilizing the HLBV method	43		49
Allocated losses (gains) to noncontrolling members based on pro rata shares of ownership	8		(1)
Total Noncontrolling Interest Allocated Losses	$	51	$	48

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.

	March 31, 2021						December 31, 2020
					Duke						Duke
	Duke		Progress		Energy		Duke		Progress		Energy
	Energy		Energy		Florida		Energy		Energy		Florida
Current Assets
Cash and cash equivalents	$	379	$	74	$	22	$	259	$	59	$	11
Other	210		13		13		194		39		39
Other Noncurrent Assets
Other	103		102		—		103		102		—
Total cash, cash equivalents and restricted cash	$	692	$	189	$	35	$	556	$	200	$	50

Schedule of Utility Inventory

The components of inventory are presented in the tables below.

	March 31, 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	$	2,365	$	816	$	1,011	$	680	$	332	$	77	$	313	$	11
Coal	464		170		160		101		59		12		122		—
Natural gas, oil and other fuel	247		35		165		101		64		19		1		26
Total inventory	$	3,076	$	1,021	$	1,336	$	882	$	455	$	108	$	436	$	37

	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