Investments in Debt and Equity Securities (Tables)

9 Months Ended

Sep. 30, 2020

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.

	September 30, 2020						December 31, 2019
	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	$	—	$	—	$	687	$	—	$	—	$	101
Equity securities	3,436		103		5,459		3,523		55		5,661
Corporate debt securities	65		1		789		37		1		603
Municipal bonds	19		1		407		13		—		368
U.S. government bonds	58		—		843		33		1		1,256
Other debt securities	9		—		185		3		—		141
Total NDTF Investments	$	3,587	$	105	$	8,370	$	3,609	$	57	$	8,130
Other Investments
Cash and cash equivalents	$	—	$	—	$	110	$	—	$	—	$	52
Equity securities	60		—		126		57		—		122
Corporate debt securities	8		—		129		3		—		67
Municipal bonds	6		1		114		4		—		94
U.S. government bonds	1		—		21		2		—		41
Other debt securities	—		—		44		—		—		56
Total Other Investments	$	75	$	1	$	544	$	66	$	—	$	432
Total Investments	$	3,662	$	106	$	8,914	$	3,675	$	57	$	8,562

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.

	September 30, 2020						December 31, 2019
	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	$	—	$	—	$	687	$	—	$	—	$	101
Equity securities	3,436		103		5,459		3,523		55		5,661
Corporate debt securities	65		1		789		37		1		603
Municipal bonds	19		1		407		13		—		368
U.S. government bonds	58		—		843		33		1		1,256
Other debt securities	9		—		185		3		—		141
Total NDTF Investments	$	3,587	$	105	$	8,370	$	3,609	$	57	$	8,130
Other Investments
Cash and cash equivalents	$	—	$	—	$	110	$	—	$	—	$	52
Equity securities	60		—		126		57		—		122
Corporate debt securities	8		—		129		3		—		67
Municipal bonds	6		1		114		4		—		94
U.S. government bonds	1		—		21		2		—		41
Other debt securities	—		—		44		—		—		56
Total Other Investments	$	75	$	1	$	544	$	66	$	—	$	432
Total Investments	$	3,662	$	106	$	8,914	$	3,675	$	57	$	8,562

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 nine months ended September 30, 2020, and 2019, were as follows.

	Three Months Ended				Nine Months Ended
(in millions)	September 30, 2020		September 30, 2019		September 30, 2020		September 30, 2019
FV-NI:
Realized gains	$	13	$	60	$	338	$	161
Realized losses	16		43		148		136
AFS:
Realized gains	26		53		73		110
Realized losses	19		36		38		83

Investments Classified by Contractual Maturity Date

The table below summarizes the maturity date for debt securities.

	September 30, 2020
			Duke				Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Indiana
Due in one year or less	$	53	$	13	$	15	$	14	$	1	$	4
Due after one through five years	558		247		256		246		10		16
Due after five through 10 years	608		278		232		224		8		9
Due after 10 years	1,313		694		542		508		34		16
Total	$	2,532	$	1,232	$	1,045	$	992	$	53	$	45

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.

	September 30, 2020						December 31, 2019
	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	$	—	$	—	$	42	$	—	$	—	$	21
Equity securities	2,027		52		3,229		1,914		8		3,154
Corporate debt securities	42		1		507		21		1		361
Municipal bonds	5		—		118		3		—		96
U.S. government bonds	28		—		428		16		1		578
Other debt securities	7		—		179		3		—		137
Total NDTF Investments	$	2,109	$	53	$	4,503	$	1,957	$	10	$	4,347

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.

	September 30, 2020						December 31, 2019
	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	$	—	$	—	$	42	$	—	$	—	$	21
Equity securities	2,027		52		3,229		1,914		8		3,154
Corporate debt securities	42		1		507		21		1		361
Municipal bonds	5		—		118		3		—		96
U.S. government bonds	28		—		428		16		1		578
Other debt securities	7		—		179		3		—		137
Total NDTF Investments	$	2,109	$	53	$	4,503	$	1,957	$	10	$	4,347

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 nine months ended September 30, 2020, and 2019, were as follows.

	Three Months Ended				Nine Months Ended
(in millions)	September 30, 2020		September 30, 2019		September 30, 2020		September 30, 2019
FV-NI:
Realized gains	$	10	$	34	$	46	$	101
Realized losses	12		26		82		95
AFS:
Realized gains	20		21		50		46
Realized losses	17		13		30		34

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.

	September 30, 2020						December 31, 2019
	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	$	—	$	—	$	645	$	—	$	—	$	80
Equity securities	1,409		51		2,230		1,609		47		2,507
Corporate debt securities	23		—		282		16		—		242
Municipal bonds	14		1		289		10		—		272
U.S. government bonds	30		—		415		17		—		678
Other debt securities	2		—		6		—		—		4
Total NDTF Investments	$	1,478	$	52	$	3,867	$	1,652	$	47	$	3,783
Other Investments
Cash and cash equivalents	$	—	$	—	$	107	$	—	$	—	$	49
Municipal bonds	4		—		53		3		—		51
Total Other Investments	$	4	$	—	$	160	$	3	$	—	$	100
Total Investments	$	1,482	$	52	$	4,027	$	1,655	$	47	$	3,883

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.

	September 30, 2020						December 31, 2019
	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	$	—	$	—	$	645	$	—	$	—	$	80
Equity securities	1,409		51		2,230		1,609		47		2,507
Corporate debt securities	23		—		282		16		—		242
Municipal bonds	14		1		289		10		—		272
U.S. government bonds	30		—		415		17		—		678
Other debt securities	2		—		6		—		—		4
Total NDTF Investments	$	1,478	$	52	$	3,867	$	1,652	$	47	$	3,783
Other Investments
Cash and cash equivalents	$	—	$	—	$	107	$	—	$	—	$	49
Municipal bonds	4		—		53		3		—		51
Total Other Investments	$	4	$	—	$	160	$	3	$	—	$	100
Total Investments	$	1,482	$	52	$	4,027	$	1,655	$	47	$	3,883

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 nine months ended September 30, 2020, and 2019, were as follows.

	Three Months Ended				Nine Months Ended
(in millions)	September 30, 2020		September 30, 2019		September 30, 2020		September 30, 2019
FV-NI:
Realized gains	$	3	$	26	$	292	$	60
Realized losses	4		17		66		41
AFS:
Realized gains	6		31		17		62
Realized losses	2		23		7		49

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.

	September 30, 2020						December 31, 2019
	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	$	—	$	—	$	57	$	—	$	—	$	53
Equity securities	1,340		51		2,150		1,258		21		2,077
Corporate debt securities	23		—		282		16		—		242
Municipal bonds	14		1		289		10		—		272
U.S. government bonds	30		—		415		16		—		403
Other debt securities	2		—		6		—		—		4
Total NDTF Investments	$	1,409	$	52	$	3,199	$	1,300	$	21	$	3,051
Other Investments
Cash and cash equivalents	$	—	$	—	$	1	$	—	$	—	$	2
Total Other Investments	$	—	$	—	$	1	$	—	$	—	$	2
Total Investments	$	1,409	$	52	$	3,200	$	1,300	$	21	$	3,053

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.

	September 30, 2020						December 31, 2019
	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	$	—	$	—	$	57	$	—	$	—	$	53
Equity securities	1,340		51		2,150		1,258		21		2,077
Corporate debt securities	23		—		282		16		—		242
Municipal bonds	14		1		289		10		—		272
U.S. government bonds	30		—		415		16		—		403
Other debt securities	2		—		6		—		—		4
Total NDTF Investments	$	1,409	$	52	$	3,199	$	1,300	$	21	$	3,051
Other Investments
Cash and cash equivalents	$	—	$	—	$	1	$	—	$	—	$	2
Total Other Investments	$	—	$	—	$	1	$	—	$	—	$	2
Total Investments	$	1,409	$	52	$	3,200	$	1,300	$	21	$	3,053

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 nine months ended September 30, 2020, and 2019, were as follows.

	Three Months Ended				Nine Months Ended
(in millions)	September 30, 2020		September 30, 2019		September 30, 2020		September 30, 2019
FV-NI:
Realized gains	$	3	$	10	$	43	$	27
Realized losses	4		9		51		24
AFS:
Realized gains	6		2		17		4
Realized losses	2		—		7		2

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.

	September 30, 2020						December 31, 2019
	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	$	—	$	—	$	588	$	—	$	—	$	27
Equity securities	69		—		80		351		26		430
U.S. government bonds	—		—		—		1		—		275
Total NDTF Investments(a)	$	69	$	—	$	668	$	352	$	26	$	732
Other Investments
Cash and cash equivalents	$	—	$	—	$	2	$	—	$	—	$	4
Municipal bonds	4		—		53		3		—		51
Total Other Investments	$	4	$	—	$	55	$	3	$	—	$	55
Total Investments	$	73	$	—	$	723	$	355	$	26	$	787

(a)

During the nine months ended September 30, 2020, Duke Energy Florida continued to receive 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.

	September 30, 2020						December 31, 2019
	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	$	—	$	—	$	588	$	—	$	—	$	27
Equity securities	69		—		80		351		26		430
U.S. government bonds	—		—		—		1		—		275
Total NDTF Investments(a)	$	69	$	—	$	668	$	352	$	26	$	732
Other Investments
Cash and cash equivalents	$	—	$	—	$	2	$	—	$	—	$	4
Municipal bonds	4		—		53		3		—		51
Total Other Investments	$	4	$	—	$	55	$	3	$	—	$	55
Total Investments	$	73	$	—	$	723	$	355	$	26	$	787

(a)

During the nine months ended September 30, 2020, Duke Energy Florida continued to receive reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.

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 nine months ended September 30, 2020, and 2019, were as follows.

	Three Months Ended				Nine Months Ended
(in millions)	September 30, 2020		September 30, 2019		September 30, 2020		September 30, 2019
FV-NI:
Realized gains	$	—	$	16	$	249	$	33
Realized losses	—		8		15		17
AFS:
Realized gains	—		29		—		58
Realized losses	—		23		—		47

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.

	September 30, 2020						December 31, 2019
	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
Cash and cash equivalents	$	—	$	—	$	1	$	—	$	—	$	—
Equity securities	45		—		84		43		—		81
Corporate debt securities	—		—		3		—		—		6
Municipal bonds	1		1		39		1		—		36
U.S. government bonds	—		—		3		—		—		2
Total Investments	$	46	$	1	$	130	$	44	$	—	$	125

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.

	September 30, 2020						December 31, 2019
	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
Cash and cash equivalents	$	—	$	—	$	1	$	—	$	—	$	—
Equity securities	45		—		84		43		—		81
Corporate debt securities	—		—		3		—		—		6
Municipal bonds	1		1		39		1		—		36
U.S. government bonds	—		—		3		—		—		2
Total Investments	$	46	$	1	$	130	$	44	$	—	$	125