Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The net amount as of the balance sheet date of the fair value of derivative assets and derivative liabilities that in accordance with the entity's accounting policy were offset against collateral under a master netting arrangement.

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Fair value, after effects of master netting arrangements, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against an obligation to return collateral. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Amount of unrealized gain (loss) related to the fair value of interest rate derivatives designated as fair value hedging instruments, as offset by the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective.

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Fair value as of the balance sheet date of all interest rate derivatives designated as cash flow hedging instruments.

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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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Fair value as of the balance sheet date of all derivative assets designated as interest rate fair value hedging instruments.

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Financial Risk Management Activities (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 1
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	1
Long-term Debt	11,483
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	2
Net cash collateral received in connection with net derivative contracts	1	$ (55)
Aggregate fair value of derivative contracts in a liability position that contains triggers for additional collateral	19	78
PSEG [Member]
Derivatives, Fair Value [Line Items]
Long-term Debt	1,200	500
Fair value of interest rate swaps designated as underlying hedges		6
Aggregate fair value of derivative contracts in a liability position that contains triggers for additional collateral	9	12
Additional collateral aggregate fair value	10	66
Amount of reduction in interest expense attributed to interest rate swaps designated as fair value hedges	6	19	$ 20
PSEG [Member] \| Variable Rate Term Loan due 2017 [Member]
Derivatives, Fair Value [Line Items]
Long-term Debt	$ 500	500
PSEG [Member] \| Senior Notes One Point Six Zero Percent Due In Two Thousand Nineteen [Member]
Derivatives, Fair Value [Line Items]
Stated interest rate of debt instrument	1.60%
Long-term Debt	$ 400	0
Debt Instrument, Face Amount	$ 400
PSEG [Member] \| Senior Notes Two Point Zero Percent Due In Two Thousand Twenty One [Member] [Member]
Derivatives, Fair Value [Line Items]
Stated interest rate of debt instrument	2.00%
Long-term Debt	$ 300	0
Debt Instrument, Face Amount	300
Power [Member]
Derivatives, Fair Value [Line Items]
Net Credit Exposure With Counterparties After Applying Collateral	354
Long-term Debt	$ 2,400	2,253
Power [Member] \| Senior Notes Three Point Zero Percent Due In Two Thousand Twenty One [Member]
Derivatives, Fair Value [Line Items]
Stated interest rate of debt instrument	3.00%
Long-term Debt	$ 700	0
Debt Instrument, Face Amount	700
Non Current Assets [Member]
Derivatives, Fair Value [Line Items]
Net cash collateral received in connection with net derivative contracts	(3)	(16)
Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Net cash collateral received in connection with net derivative contracts	4	12
Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Net cash collateral received in connection with net derivative contracts		2
Current Assets [Member]
Derivatives, Fair Value [Line Items]
Net cash collateral received in connection with net derivative contracts		$ (53)
Fair Value Hedging [Member] \| PSEG [Member]
Derivatives, Fair Value [Line Items]
Aggregate amount of series of interest rate swaps converting to variable-rate debt	550
Cash Flow Hedging [Member] \| PSEG [Member]
Derivatives, Fair Value [Line Items]
Aggregate amount of series of interest rate swaps converting to variable-rate debt	500
Cash Flow Hedging [Member] \| PSEG [Member] \| Senior Notes One Point Six Zero Percent Due In Two Thousand Nineteen [Member]
Derivatives, Fair Value [Line Items]
Aggregate amount of series of interest rate swaps converting to variable-rate debt	400
Cash Flow Hedging [Member] \| PSEG [Member] \| Senior Notes Two Point Zero Percent Due In Two Thousand Twenty One [Member] [Member]
Derivatives, Fair Value [Line Items]
Aggregate amount of series of interest rate swaps converting to variable-rate debt	$ 300