Available-for-Sale Securities (Tables)

3 Months Ended

Mar. 31, 2016

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

Fair Values And Gross Unrealized Gains And Losses For The Securities Held In The NDT Fund

The following tables show the fair values and gross unrealized gains and losses for the securities held in the NDT Fund.

	As of March 31, 2016
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	Millions
Equity Securities	$	690	$	195	$	(13	)	$	872
Debt Securities
Government Obligations	487		15		—			502
Other	369		9		(6		)	372
Total Debt Securities	856		24		(6		)	874
Other Securities	32		—		—			32
Total NDT Available-for-Sale Securities	$	1,578	$	219	$	(19	)	$	1,778

	As of December 31, 2015
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	Millions
Equity Securities	$	693	$	185	$	(13	)	$	865
Debt Securities
Government Obligations	483		8		(3		)	488
Other	366		3		(10		)	359
Total Debt Securities	849		11		(13		)	847
Other Securities	42		—		—			42
Total NDT Available-for-Sale Securities	$	1,584	$	196	$	(26	)	$	1,754

Schedule Of Accounts Receivable And Accounts Payable in the NDT Funds

The amounts in the preceding tables do not include receivables and payables for NDT Fund transactions which have not settled at the end of each period. Such amounts are included in Accounts Receivable and Accounts Payable on the Condensed Consolidated Balance Sheets as shown in the following table.

	As of		As of
	March 31, 2016		December 31, 2015
	Millions
Accounts Receivable	$	16	$	17
Accounts Payable	$	9	$	10

Value Of Securities That Have Been In An Unrealized Loss Position For Less Than And Greater Than 12 Months

The following table shows the value of securities in the NDT Fund that have been in an unrealized loss position for less than and greater than 12 months.

	As of March 31, 2016										As of December 31, 2015
	Less Than 12 Months					Greater Than 12 Months					Less Than 12 Months					Greater Than 12 Months
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	Millions
Equity Securities (A)	$	123	$	(13	)	$	1	$	—		$	151	$	(13	)	$	1	$	—
Debt Securities
Government Obligations (B)	29		—			19		—			245		(2		)	19		(1		)
Other (C)	61		(2		)	48		(4		)	222		(7		)	36		(3		)
Total Debt Securities	90		(2		)	67		(4		)	467		(9		)	55		(4		)
NDT Available-for-Sale Securities	$	213	$	(15	)	$	68	$	(4	)	$	618	$	(22	)	$	56	$	(4	)

(A) Equity Securities—Investments in marketable equity securities within the NDT Fund are primarily in common stocks within a broad range of industries and sectors. The unrealized losses are distributed over a broad range of securities with limited impairment durations. Power does not consider these securities to be other-than-temporarily impaired as of March 31, 2016.

(B) Debt Securities (Government Obligations)—Unrealized losses on Power’s NDT investments in U.S. Treasury obligations and Federal Agency mortgage-backed securities were caused by interest rate changes. Since these investments are guaranteed by the U.S. government or an agency of the U.S. government, it is not expected that these securities will settle for less than their amortized cost basis, since Power does not intend to sell nor will it be more-likely-than-not required to sell. Power does not consider these securities to be other-than-temporarily impaired as of March 31, 2016.

(C) Debt Securities (Other)—Power’s investments in corporate bonds are primarily in investment grade securities. It is not expected that these securities would settle for less than their amortized cost. Since Power does not intend to sell these securities nor will it be more-likely-than-not required to sell, Power does not consider these debt securities to be other-than-temporarily impaired as of March 31, 2016.

Proceeds From The Sales Of And The Net Realized Gains On Securities In The NDT Funds And Rabbi Trusts

		Three Months Ended
		March 31,
		2016			2015
	Millions
Proceeds from NDT Fund Sales (A)		$	177		$	590
Net Realized Gains (Losses) on NDT Fund:
Gross Realized Gains		15			19
Gross Realized Losses		(16		)	(9		)
Net Realized Gains (Losses) on NDT Fund		$	(1	)	$	10

(A) 2015 proceeds include activity in accounts related to the liquidation of funds being transitioned to new managers

Amount Of Available-For-Sale Debt Securities By Maturity Periods

The NDT available-for-sale debt securities held as of March 31, 2016 had the following maturities:

Time Frame	Fair Value
	Millions
Less than one year	$	24
1 - 5 years	215
6 - 10 years	209
11 - 15 years	57
16 - 20 years	53
Over 20 years	316
Total NDT Available-for-Sale Debt Securities	$	874

Rabbi Trust [Member]

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

Value Of Securities That Have Been In An Unrealized Loss Position For Less Than And Greater Than 12 Months

The following table shows the value of securities in the Rabbi Trust Fund that have been in an unrealized loss position for less than and greater than 12 months.

	As of March 31, 2016										As of December 31, 2015
	Less Than 12 Months					Greater Than 12 Months					Less Than 12 Months					Greater Than 12 Months
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	Millions
Equity Securities (A)	$	—	$	—		$	—	$	—		$	—	$	—		$	—	$	—
Debt Securities
Government Obligations (B)	10		—			2		—			53		(1		)	2		—
Other (C)	30		(1		)	11		(1		)	46		(1		)	9		—
Total Debt Securities	40		(1		)	13		(1		)	99		(2		)	11		—
Rabbi Trust Available-for-Sale Securities	$	40	$	(1	)	$	13	$	(1	)	$	99	$	(2	)	$	11	$	—

(A) Equity Securities—Investments in marketable equity securities within the Rabbi Trust Fund are through a mutual fund which invests primarily in common stocks within a broad range of industries and sectors.

(B) Debt Securities (Government Obligations)—Unrealized losses on PSEG’s Rabbi Trust investments in U.S. Treasury obligations and Federal Agency mortgage-backed securities were caused by interest rate changes. Since these investments are guaranteed by the U.S. government or an agency of the U.S. government, it is not expected that these securities will settle for less than their amortized cost basis, since PSEG does not intend to sell nor will it be more-likely-than-not required to sell. PSEG does not consider these securities to be other-than-temporarily impaired as of March 31, 2016.

(C) Debt Securities (Other)—PSEG’s investments in corporate bonds are primarily in investment grade securities. It is not expected that these securities would settle for less than their amortized cost. Since PSEG does not intend to sell these securities nor will it be more-likely-than-not required to sell, PSEG does not consider these debt securities to be other-than-temporarily impaired as of March 31, 2016.

Securities Held In The Rabbi Trusts

The following tables show the fair values, gross unrealized gains and losses and amortized cost basis for the securities held in the Rabbi Trust.

	As of March 31, 2016
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	Millions
Equity Securities	$	12	$	8	$	—		$	20
Debt Securities
Government Obligations	107		2		—			109
Other	84		1		(2		)	83
Total Debt Securities	191		3		(2		)	192
Other Securities	5		—		—			5
Total Rabbi Trust Available-for-Sale Securities	$	208	$	11	$	(2	)	$	217

	As of December 31, 2015
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	Millions
Equity Securities	$	12	$	10	$	—		$	22
Debt Securities
Government Obligations	108		1		(1		)	108
Other	82		—		(1		)	81
Total Debt Securities	190		1		(2		)	189
Other Securities	2		—		—			2
Total Rabbi Trust Available-for-Sale Securities	$	204	$	11	$	(2	)	$	213

Schedule of Accounts Receivable and Accounts Payable in the Rabbi Trust Funds [Table Text Block]

The amounts in the preceding tables do not include receivables and payables for Rabbi Trust Fund transactions which have not settled at the end of each period. Such amounts are included in Accounts Receivable and Accounts Payable on the Condensed Consolidated Balance Sheets as shown in the following table.

	As of		As of
	March 31, 2016		December 31, 2015
	Millions
Accounts Receivable	$	3	$	1
Accounts Payable	$	5	$	—

Proceeds From The Sales Of And The Net Realized Gains On Securities In The NDT Funds And Rabbi Trusts

The proceeds from the sales of and the net realized gains (losses) on securities in the Rabbi Trust Fund were:

		Three Months Ended
		March 31,
		2016			2015
	Millions
Proceeds from Rabbi Trust Sales (A)		$	25		$	19
Net Realized Gains (Losses) on Rabbi Trust:
Gross Realized Gains		$	1		$	—
Gross Realized Losses		(1		)	—
Net Realized Gains (Losses) on Rabbi Trust		$	—		$	—

(A) 2015 proceeds include activity in accounts related to the liquidation of funds being transitioned to new managers

Amount Of Available-For-Sale Debt Securities By Maturity Periods

The Rabbi Trust available-for-sale debt securities held as of March 31, 2016 had the following maturities:

Time Frame	Fair Value
	Millions
Less than one year	$	9
1 - 5 years	42
6 - 10 years	47
11 - 15 years	5
16 - 20 years	9
Over 20 years	80
Total Rabbi Trust Available-for-Sale Debt Securities	$	192

Fair Value Of The Rabbi Trusts

The fair value of assets in the Rabbi Trust related to PSEG, PSE&G and Power are detailed as follows:

	As of		As of
	March 31, 2016		December 31, 2015
	Millions
PSE&G	$	43	$	42
Power	53		52
Other	121		119
Total Rabbi Trust Available-for-Sale Securities	$	217	$	213