Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Accumulated Other Comprehensive Income (Loss), Net of Tax

PSEG	Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)	Cash Flow Hedges		Pension and OPEB Plans		Available-for -Sale Securities		Total
	Millions
Balance as of December 31, 2017	$	—	$	(406)	$	177	$	(229)
Cumulative Effect Adjustment to Reclassify Unrealized Net Gains on Equity Investments to Retained Earnings	—		—		(176)		(176)
Current Period Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss) before Reclassifications	(1)		17		(25)		(9)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	—		29		8		37
Net Current Period Other Comprehensive Income (Loss)	(1)		46		(17)		28
Net Change in Accumulated Other Comprehensive Income (Loss)	(1)		46		(193)		(148)
Balance as of December 31, 2018	$	(1)	$	(360)	$	(16)	$	(377)
Cumulative Effect Adjustment to Reclassify Stranded Tax Effects Resulting in the Change in the Federal Corporate Income Tax to Retained Earnings	—		(81)		—		(81)
Current Period Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss) before Reclassifications	(17)		(70)		49		(38)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	3		12		(8)		7
Net Current Period Other Comprehensive Income (Loss)	(14)		(58)		41		(31)
Net Change in Accumulated Other Comprehensive Income (Loss)	(14)		(139)		41		(112)
Balance as of December 31, 2019	$	(15)	$	(499)	$	25	$	(489)
Other Comprehensive Income (Loss) before Reclassifications	(4)		(58)		51		(11)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	10		12		(26)		(4)
Net Current Period Other Comprehensive Income (Loss)	6		(46)		25		(15)
Balance as of December 31, 2020	$	(9)	$	(545)	$	50	$	(504)

PSEG Power	Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)	Cash Flow Hedges		Pension and OPEB Plans		Available-for -Sale Securities		Total
	Millions
Balance as of December 31, 2017	$	—	$	(347)	$	175	$	(172)
Cumulative Effect Adjustment to Reclassify Unrealized Net Gains on Equity Investments to Retained Earnings	—		—		(175)		(175)
Current Period Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss) before Reclassifications	—		16		(19)		(3)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	—		25		6		31
Net Current Period Other Comprehensive Income (Loss)	—		41		(13)		28
Net Change in Accumulated Other Comprehensive Income (Loss)	—		41		(188)		(147)
Balance as of December 31, 2018	$	—	$	(306)	$	(13)	$	(319)
Cumulative Effect Adjustment to Reclassify Stranded Tax Effects Resulting in the Change in the Federal Corporate Income Tax to Retained Earnings	—		(69)		—		(69)
Current Period Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss) before Reclassifications	—		(55)		38		(17)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	—		10		(6)		4
Net Current Period Other Comprehensive Income (Loss)	—		(45)		32		(13)
Net Change in Accumulated Other Comprehensive Income (Loss)	—		(114)		32		(82)
Balance as of December 31, 2019	$	—	$	(420)	$	19	$	(401)
Other Comprehensive Income (Loss) before Reclassifications	—		(48)		41		(7)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	—		9		(20)		(11)
Net Current Period Other Comprehensive Income (Loss)	—		(39)		21		(18)
Balance as of December 31, 2020	$	—	$	(459)	$	40	$	(419)

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

PSEG		Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement
		Year Ended December 31, 2018
Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	Location of Pre-Tax Amount in Statement of Operations	Pre-Tax Amount		Tax (Expense) Benefit		After-Tax Amount
		Millions
Pension and OPEB Plans
Amortization of Prior Service (Cost) Credit	Non-Operating Pension and OPEB Credits (Costs)	$	6	$	(2)	$	4
Amortization of Actuarial Loss	Non-Operating Pension and OPEB Credits (Costs)	(47)		14		(33)
Total Pension and OPEB Plans		(41)		12		(29)
Available-for-Sale Securities
Realized Gains (Losses)	Net Gains (Losses) on Trust Investments	(13)		5		(8)
Total Available-for-Sale Securities		(13)		5		(8)
Total		$	(54)	$	17	$	(37)
PSEG Power		Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement
		Year Ended December 31, 2018
Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	Location of Pre-Tax Amount in Statement of Operations	Pre-Tax Amount		Tax (Expense) Benefit		After-Tax Amount
		Millions
Pension and OPEB Plans
Amortization of Prior Service (Cost) Credit	Non-Operating Pension and OPEB Credits (Costs)	$	5	$	(1)	$	4
Amortization of Actuarial Loss	Non-Operating Pension and OPEB Credits (Costs)	(40)		11		(29)
Total Pension and OPEB Plans		(35)		10		(25)
Available-for-Sale Securities
Realized Gains (Losses)	Net Gains (Losses) on Trust Investments	(11)		5		(6)
Total Available-for-Sale Securities		(11)		5		(6)
Total		$	(46)	$	15	$	(31)

PSEG		Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement
		Year Ended December 31, 2019
Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	Location of Pre-Tax Amount in Statement of Operations	Pre-Tax Amount		Tax (Expense) Benefit		After-Tax Amount
		Millions
Cash Flow Hedges
Interest Rate Swaps	Interest Expense	$	(4)	$	1	$	(3)
Total Cash Flow Hedges		(4)		1		(3)
Pension and OPEB Plans
Amortization of Prior Service (Cost) Credit	Non-Operating Pension and OPEB Credits (Costs)	26		(7)		19
Amortization of Actuarial Loss	Non-Operating Pension and OPEB Credits (Costs)	(43)		12		(31)
Total Pension and OPEB Plans		(17)		5		(12)
Available-for-Sale Securities
Realized Gains (Losses)	Net Gains (Losses) on Trust Investments	13		(5)		8
Total Available-for-Sale Securities		13		(5)		8
Total		$	(8)	$	1	$	(7)
PSEG Power		Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement
		Year Ended December 31, 2019
Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	Location of Pre-Tax Amount in Statement of Operations	Pre-Tax Amount		Tax (Expense) Benefit		After-Tax Amount
		Millions
Pension and OPEB Plans
Amortization of Prior Service (Cost) Credit	Non-Operating Pension and OPEB Credits (Costs)	$	23	$	(7)	$	16
Amortization of Actuarial Loss	Non-Operating Pension and OPEB Credits (Costs)	(36)		10		(26)
Total Pension and OPEB Plans		(13)		3		(10)
Available-for-Sale Securities
Realized Gains (Losses)	Net Gains (Losses) on Trust Investments	10		(4)		6
Total Available-for-Sale Securities		10		(4)		6
Total		$	(3)	$	(1)	$	(4)

PSEG		Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement
		Year Ended December 31, 2020
Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	Location of Pre-Tax Amount in Statement of Operations	Pre-Tax Amount		Tax (Expense) Benefit		After-Tax Amount
		Millions
Cash Flow Hedges
Interest Rate Swaps	Interest Expense	$	(14)	$	4	$	(10)
Total Cash Flow Hedges		(14)		4		(10)
Pension and OPEB Plans
Amortization of Prior Service (Cost) Credit	Non-Operating Pension and OPEB Credits (Costs)	24		(7)		17
Amortization of Actuarial Loss	Non-Operating Pension and OPEB Credits (Costs)	(40)		11		(29)
Total Pension and OPEB Plans		(16)		4		(12)
Available-for-Sale Securities
Realized Gains (Losses) and Impairments	Net Gains (Losses) on Trust Investments	42		(16)		26
Total Available-for-Sale Securities		42		(16)		26
Total		$	12	$	(8)	$	4
PSEG Power		Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement
		Year Ended December 31, 2020
Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	Location of Pre-Tax Amount in Statement of Operations	Pre-Tax Amount		Tax (Expense) Benefit		After-Tax Amount
		Millions
Pension and OPEB Plans
Amortization of Prior Service (Cost) Credit	Non-Operating Pension and OPEB Credits (Costs)	$	21	$	(6)	$	15
Amortization of Actuarial Loss	Non-Operating Pension and OPEB Credits (Costs)	(34)		10		(24)
Total Pension and OPEB Plans		(13)		4		(9)
Available-for-Sale Securities
Realized Gains (Losses) and Impairments	Net Gains (Losses) on Trust Investments	34		(14)		20
Total Available-for-Sale Securities		34		(14)		20
Total		$	21	$	(10)	$	11