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

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Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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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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Fair value of credit risk derivative liability.

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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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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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Financial Risk Management Activities (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	$ 1
Floating Rate term loans			$ 13,158
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		44
PSEG [Member]
Derivatives, Fair Value [Line Items]
Floating Rate term loans	1,200		2,100
Amount of reduction in interest expense attributed to interest rate swaps designated as fair value hedges	6	$ 19
PSEG [Member] \| Term Loan maturing in 2017 [Member]
Derivatives, Fair Value [Line Items]
Floating Rate term loans	500		$ 0
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%
Floating Rate term loans	400		$ 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%
Floating Rate term loans	300		$ 300
Power [Member]
Derivatives, Fair Value [Line Items]
Net Credit Exposure With Counterparties After Applying Collateral			306
Floating Rate term loans	2,400		2,400
Credit Risk Derivative Liabilities, at Fair Value	19		30
Aggregate fair value of derivative contracts in a liability position that contains triggers for additional collateral	9		13
Additional collateral aggregate fair value	10		$ 17
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%
Floating Rate term loans	$ 700		$ 700
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