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Investments in Debt and Equity Securities (Tables)

6 Months Ended

Jun. 30, 2016

Schedule of Available-for-sale Securities [Line Items]

The following table presents the estimated fair value of investments in available-for-sale securities.



	June 30, 2016						December 31, 2015
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses_(b)		Value		Gains		Losses_(b)		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	189	$	—	$	—	$	179
Equity securities	1,869		78		3,834		1,823		58		3,590
Corporate debt securities	22		1		480		7		8		432
Municipal bonds	12		1		307		5		1		185
U.S. government bonds	38		—		1,038		11		5		1,254
Other debt securities	1		3		144		—		4		177
Total NDTF	$	1,942	$	83	$	5,992	$	1,846	$	76	$	5,817
Other Investments
Cash and cash equivalents	$	—	$	—	$	27	$	—	$	—	$	29
Equity securities	34		1		98		32		1		95
Corporate debt securities	2		1		97		1		3		92
Municipal bonds	6		1		80		3		1		74
U.S. government bonds	2		—		47		—		—		45
Other debt securities	—		1		57		—		2		62
Total Other Investments^(a)	$	44	$	4	$	406	$	36	$	7	$	397
Total Investments	$	1,986	$	87	$	6,398	$	1,882	$	83	$	6,214

(a) These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.


(b)	Substantially all these amounts are considered other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset.

Investments Classified by Contractual Maturity Date

The table below summarizes the maturity date for debt securities.



(in millions)	June 30, 2016
Due in one year or less	$	88
Due after one through five years	660
Due after five through 10 years	511
Due after 10 years	991
Total	$	2,250

Schedule of Realized Gain (Loss)

Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows.



	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions)	2016		2015		2016		2015
Realized gains	$	64	$	28	$	118	$	130
Realized losses	42		17		92		31

Duke Energy Carolinas [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities

The following table presents the estimated fair value of investments in available-for-sale securities.



	June 30, 2016						December 31, 2015
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses_(b)		Value		Gains		Losses_(b)		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	66	$	—	$	—	$	34
Equity securities	1,045		44		2,128		1,021		27		2,094
Corporate debt securities	13		1		309		3		5		292
Municipal bonds	2		—		42		1		—		33
U.S. government bonds	16		—		482		3		3		438
Other debt securities	1		3		136		—		4		147
Total NDTF	$	1,077	$	48	$	3,163	$	1,028	$	39	$	3,038
Other Investments
Other debt securities	$	—	$	1	$	3	$	—	$	1	$	3
Total Other Investments^(a)	$	—	$	1	$	3	$	—	$	1	$	3
Total Investments	$	1,077	$	49	$	3,166	$	1,028	$	40	$	3,041


(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.


(b)	Substantially all these amounts represent other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset.

Investments Classified by Contractual Maturity Date

The table below summarizes the maturity date for debt securities.



(in millions)	June 30, 2016
Due in one year or less	$	6
Due after one through five years	198
Due after five through 10 years	235
Due after 10 years	533
Total	$	972

Schedule of Realized Gain (Loss)

Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows.



	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions)	2016		2015		2016		2015
Realized gains	$	33	$	17	$	67	$	107
Realized losses	19		11		56		23

Progress Energy [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities

The following table presents the estimated fair value of investments in available-for-sale securities.



	June 30, 2016						December 31, 2015
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses_(b)		Value		Gains		Losses_(b)		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	123	$	—	$	—	$	145
Equity securities	824		34		1,706		802		31		1,496
Corporate debt securities	9		—		171		4		3		140
Municipal bonds	10		1		265		4		1		152
U.S. government bonds	22		—		556		8		2		816
Other debt securities	—		—		8		—		—		30
Total NDTF	$	865	$	35	$	2,829	$	818	$	37	$	2,779
Other Investments
Cash and cash equivalents	$	—	$	—	$	21	$	—	$	—	$	18
Municipal bonds	4		—		47		3		—		45
Total Other Investments^(a)	$	4	$	—	$	68	$	3	$	—	$	63
Total Investments	$	869	$	35	$	2,897	$	821	$	37	$	2,842

(a) These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.


(b)	Substantially all these amounts represent other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset.

Investments Classified by Contractual Maturity Date

The table below summarizes the maturity date for debt securities.



(in millions)	June 30, 2016
Due in one year or less	$	65
Due after one through five years	375
Due after five through 10 years	200
Due after 10 years	407
Total	$	1,047

Schedule of Realized Gain (Loss)

Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows.



	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions)	2016		2015		2016		2015
Realized gains	$	31	$	9	$	50	$	21
Realized losses	23		5		36		6

Duke Energy Progress [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities

The following table presents the estimated fair value of investments in available-for-sale securities.



	June 30, 2016						December 31, 2015
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses_(b)		Value		Gains		Losses_(b)		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	58	$	—	$	—	$	110
Equity securities	614		28		1,379		596		25		1,178
Corporate debt securities	7		—		118		3		2		96
Municipal bonds	10		1		265		4		1		150
U.S. government bonds	14		—		281		6		2		486
Other debt securities	—		—		5		—		—		18
Total NDTF	$	645	$	29	$	2,106	$	609	$	30	$	2,038
Other Investments
Cash and cash equivalents	$	—	$	—	$	1	$	—	$	—	$	1
Total Other Investments^(a)	$	—	$	—	$	1	$	—	$	—	$	1
Total Investments	$	645	$	29	$	2,107	$	609	$	30	$	2,039

(a) These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.


(b)	Substantially all these amounts represent other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset.

Investments Classified by Contractual Maturity Date

The table below summarizes the maturity date for debt securities.



(in millions)	June 30, 2016
Due in one year or less	$	14
Due after one through five years	191
Due after five through 10 years	154
Due after 10 years	310
Total	$	669

Schedule of Realized Gain (Loss)

Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows.



	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions)	2016		2015		2016		2015
Realized gains	$	27	$	8	$	42	$	17
Realized losses	20		4		31		5

Duke Energy Florida [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities

The following table presents the estimated fair value of investments in available-for-sale securities.



	June 30, 2016						December 31, 2015
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses_(b)		Value		Gains		Losses_(b)		Value
NDTF
Cash and cash equivalents	$	—	$	—	$	65	$	—	$	—	$	35
Equity securities	210		6		327		206		6		318
Corporate debt securities	2		—		53		1		1		44
Municipal bonds	—		—		—		—		—		2
U.S. government bonds	8		—		275		2		—		330
Other debt securities	—		—		3		—		—		12
Total NDTF	$	220	$	6	$	723	$	209	$	7	$	741
Other Investments
Cash and cash equivalents	$	—	$	—	$	4	$	—	$	—	$	6
Municipal bonds	4		—		47		3		—		45
Total Other Investments^(a)	$	4	$	—	$	51	$	3	$	—	$	51
Total Investments	$	224	$	6	$	774	$	212	$	7	$	792

(a) These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.


(b)	Substantially all these amounts represent other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset.

Investments Classified by Contractual Maturity Date

The table below summarizes the maturity date for debt securities.



(in millions)	June 30, 2016
Due in one year or less	$	51
Due after one through five years	184
Due after five through 10 years	46
Due after 10 years	97
Total	$	378

Schedule of Realized Gain (Loss)

Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows.



	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions)	2016		2015		2016		2015
Realized gains	$	4	$	1	$	8	$	4
Realized losses	3		1		5		1

Duke Energy Indiana [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities

The following table presents the estimated fair value of investments in available-for-sale securities.



	June 30, 2016						December 31, 2015
	Gross		Gross				Gross		Gross
	Unrealized		Unrealized		Estimated		Unrealized		Unrealized		Estimated
	Holding		Holding		Fair		Holding		Holding		Fair
(in millions)	Gains		Losses_(b)		Value		Gains		Losses_(b)		Value
Other Investments
Cash and cash equivalents	$	—	$	—	$	—	$	—	$	—	$	2
Equity securities	28		—		73		27		—		71
Corporate debt securities	—		—		2		—		—		2
Municipal bonds	1		1		29		—		1		26
Total Other Investments^(a)	$	29	$	1	$	104	$	27	$	1	$	101
Total Investments	$	29	$	1	$	104	$	27	$	1	$	101

(a) These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.


(b)	Substantially all these amounts represent other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset.

Investments Classified by Contractual Maturity Date

The table below summarizes the maturity date for debt securities.



(in millions)	June 30, 2016
Due in one year or less	$	2
Due after one through five years	16
Due after five through 10 years	8
Due after 10 years	5
Total	$	31

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details