Investments in Debt and Equity Securities (Tables)

6 Months Ended

Jun. 30, 2022

Debt Securities, Available-for-sale [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	134	$	—	$	—	$	160
Equity securities	3,500		141		5,751		4,905		43		7,350
Corporate debt securities	—		81		728		39		6		829
Municipal bonds	—		32		334		14		1		314
U.S. government bonds	2		89		1,462		31		12		1,568
Other debt securities	—		14		170		3		1		180
Total NDTF Investments	$	3,502	$	357	$	8,579	$	4,992	$	63	$	10,401
Other Investments
Cash and cash equivalents	$	—	$	—	$	51	$	—	$	—	$	36
Equity securities	20		17		124		36		—		156
Corporate debt securities	—		13		108		2		1		119
Municipal bonds	—		3		82		3		1		80
U.S. government bonds	—		5		49		—		—		56
Other debt securities	—		2		35		—		1		45
Total Other Investments	$	20	$	40	$	449	$	41	$	3	$	492
Total Investments	$	3,522	$	397	$	9,028	$	5,033	$	66	$	10,893

Debt Securities, Available-for-sale

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	134	$	—	$	—	$	160
Equity securities	3,500		141		5,751		4,905		43		7,350
Corporate debt securities	—		81		728		39		6		829
Municipal bonds	—		32		334		14		1		314
U.S. government bonds	2		89		1,462		31		12		1,568
Other debt securities	—		14		170		3		1		180
Total NDTF Investments	$	3,502	$	357	$	8,579	$	4,992	$	63	$	10,401
Other Investments
Cash and cash equivalents	$	—	$	—	$	51	$	—	$	—	$	36
Equity securities	20		17		124		36		—		156
Corporate debt securities	—		13		108		2		1		119
Municipal bonds	—		3		82		3		1		80
U.S. government bonds	—		5		49		—		—		56
Other debt securities	—		2		35		—		1		45
Total Other Investments	$	20	$	40	$	449	$	41	$	3	$	492
Total Investments	$	3,522	$	397	$	9,028	$	5,033	$	66	$	10,893

Schedule of Realized Gain (Loss)

Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows.

	Three Months Ended				Six Months Ended
(in millions)	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
FV-NI:
Realized gains	$	34	$	146	$	145	$	286
Realized losses	101		37		186		60
AFS:
Realized gains	11		16		15		34
Realized losses	42		18		65		31

Investments Classified by Contractual Maturity Date

The table below summarizes the maturity date for debt securities.

	June 30, 2022
			Duke				Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Indiana
Due in one year or less	$	137	$	7	$	118	$	24	$	94	$	9
Due after one through five years	930		350		501		266		235		23
Due after five through 10 years	484		209		204		189		15		6
Due after 10 years	1,417		777		553		515		38		23
Total	$	2,968	$	1,343	$	1,376	$	994	$	382	$	61

Duke Energy Carolinas

Debt Securities, Available-for-sale [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	58	$	—	$	—	$	53
Equity securities	2,058		69		3,327		2,887		19		4,265
Corporate debt securities	—		63		470		24		4		506
Municipal bonds	—		9		63		2		—		48
U.S. government bonds	1		37		645		16		3		712
Other debt securities	—		13		165		3		1		175
Total NDTF Investments	$	2,059	$	191	$	4,728	$	2,932	$	27	$	5,759

Debt Securities, Available-for-sale

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	58	$	—	$	—	$	53
Equity securities	2,058		69		3,327		2,887		19		4,265
Corporate debt securities	—		63		470		24		4		506
Municipal bonds	—		9		63		2		—		48
U.S. government bonds	1		37		645		16		3		712
Other debt securities	—		13		165		3		1		175
Total NDTF Investments	$	2,059	$	191	$	4,728	$	2,932	$	27	$	5,759

Schedule of Realized Gain (Loss)

Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows.

	Three Months Ended				Six Months Ended
(in millions)	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
FV-NI:
Realized gains	$	18	$	90	$	93	$	218
Realized losses	55		23		104		39
AFS:
Realized gains	9		12		12		25
Realized losses	21		13		37		22

Progress Energy

Debt Securities, Available-for-sale [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	76	$	—	$	—	$	107
Equity securities	1,442		72		2,424		2,018		24		3,085
Corporate debt securities	—		18		258		15		2		323
Municipal bonds	—		23		271		12		1		266
U.S. government bonds	1		52		817		15		9		856
Other debt securities	—		1		5		—		—		5
Total NDTF Investments	$	1,443	$	166	$	3,851	$	2,060	$	36	$	4,642
Other Investments
Cash and cash equivalents	$	—	$	—	$	15	$	—	$	—	$	20
Municipal bonds	—		—		25		2		—		26
Total Other Investments	$	—	$	—	$	40	$	2	$	—	$	46
Total Investments	$	1,443	$	166	$	3,891	$	2,062	$	36	$	4,688

Debt Securities, Available-for-sale

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	76	$	—	$	—	$	107
Equity securities	1,442		72		2,424		2,018		24		3,085
Corporate debt securities	—		18		258		15		2		323
Municipal bonds	—		23		271		12		1		266
U.S. government bonds	1		52		817		15		9		856
Other debt securities	—		1		5		—		—		5
Total NDTF Investments	$	1,443	$	166	$	3,851	$	2,060	$	36	$	4,642
Other Investments
Cash and cash equivalents	$	—	$	—	$	15	$	—	$	—	$	20
Municipal bonds	—		—		25		2		—		26
Total Other Investments	$	—	$	—	$	40	$	2	$	—	$	46
Total Investments	$	1,443	$	166	$	3,891	$	2,062	$	36	$	4,688

Schedule of Realized Gain (Loss)

Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows.

	Three Months Ended				Six Months Ended
(in millions)	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
FV-NI:
Realized gains	$	16	$	56	$	52	$	68
Realized losses	46		14		82		21
AFS:
Realized gains	2		3		3		7
Realized losses	17		3		23		6

Duke Energy Progress

Debt Securities, Available-for-sale [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	46	$	—	$	—	$	94
Equity securities	1,363		72		2,333		1,915		23		2,970
Corporate debt securities	—		17		241		15		2		282
Municipal bonds	—		23		271		12		1		266
U.S. government bonds	1		31		477		15		3		472
Other debt securities	—		1		5		—		—		5
Total NDTF Investments	$	1,364	$	144	$	3,373	$	1,957	$	29	$	4,089
Other Investments
Cash and cash equivalents	$	—	$	—	$	12	$	—	$	—	$	16
Total Other Investments	$	—	$	—	$	12	$	—	$	—	$	16
Total Investments	$	1,364	$	144	$	3,385	$	1,957	$	29	$	4,105

Debt Securities, Available-for-sale

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	46	$	—	$	—	$	94
Equity securities	1,363		72		2,333		1,915		23		2,970
Corporate debt securities	—		17		241		15		2		282
Municipal bonds	—		23		271		12		1		266
U.S. government bonds	1		31		477		15		3		472
Other debt securities	—		1		5		—		—		5
Total NDTF Investments	$	1,364	$	144	$	3,373	$	1,957	$	29	$	4,089
Other Investments
Cash and cash equivalents	$	—	$	—	$	12	$	—	$	—	$	16
Total Other Investments	$	—	$	—	$	12	$	—	$	—	$	16
Total Investments	$	1,364	$	144	$	3,385	$	1,957	$	29	$	4,105

Schedule of Realized Gain (Loss)

Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows.

	Three Months Ended				Six Months Ended
(in millions)	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
FV-NI:
Realized gains	$	15	$	55	$	51	$	67
Realized losses	45		13		80		20
AFS:
Realized gains	2		3		3		7
Realized losses	15		3		20		6

Duke Energy Florida

Debt Securities, Available-for-sale [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	30	$	—	$	—	$	13
Equity securities	79		—		91		103		1		115
Corporate debt securities	—		1		17		—		—		41
U.S. government bonds	—		21		340		—		6		384
Total NDTF Investments(a)	$	79	$	22	$	478	$	103	$	7	$	553
Other Investments
Cash and cash equivalents	$	—	$	—	$	1	$	—	$	—	$	3
Municipal bonds	—		—		25		2		—		26
Total Other Investments	$	—	$	—	$	26	$	2	$	—	$	29
Total Investments	$	79	$	22	$	504	$	105	$	7	$	582

(a)During the six months ended June 30, 2022, and the year ended December 31, 2021, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.

Debt Securities, Available-for-sale

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	30	$	—	$	—	$	13
Equity securities	79		—		91		103		1		115
Corporate debt securities	—		1		17		—		—		41
U.S. government bonds	—		21		340		—		6		384
Total NDTF Investments(a)	$	79	$	22	$	478	$	103	$	7	$	553
Other Investments
Cash and cash equivalents	$	—	$	—	$	1	$	—	$	—	$	3
Municipal bonds	—		—		25		2		—		26
Total Other Investments	$	—	$	—	$	26	$	2	$	—	$	29
Total Investments	$	79	$	22	$	504	$	105	$	7	$	582

(a)During the six months ended June 30, 2022, and the year ended December 31, 2021, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.

Duke Energy Indiana

Debt Securities, Available-for-sale [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
Investments
Equity securities	$	2	$	17	$	77	$	6	$	—	$	97
Corporate debt securities	—		—		8		—		—		6
Municipal bonds	—		3		48		1		1		46
U.S. government bonds	—		—		5		—		—		12
Total Investments	$	2	$	20	$	138	$	7	$	1	$	161

Debt Securities, Available-for-sale

The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS.

	June 30, 2022						December 31, 2021
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses		Value		Gains		Losses		Value
Investments
Equity securities	$	2	$	17	$	77	$	6	$	—	$	97
Corporate debt securities	—		—		8		—		—		6
Municipal bonds	—		3		48		1		1		46
U.S. government bonds	—		—		5		—		—		12
Total Investments	$	2	$	20	$	138	$	7	$	1	$	161