Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	$ 558	$ 114
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	280	828
Amortization of Nuclear Fuel	50	54
Emission Allowances and Renewable Energy Credit Compliance Accrual	24	26
Provision for Deferred Income Taxes and ITC	76	(85)
Non-Cash Employee Benefit Plan Costs	17	23
Leveraged Lease Income, Adjusted for Rents Received and Deferred Taxes	4	(15)
Loss on Leases, net of tax	0	32
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(119)	(5)
Net Change in Regulatory Assets and Liabilities	(6)	(60)
Cost of Removal	(38)	(24)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	12	(23)
Net Change in Certain Current Assets and Liabilities:
Tax Receivable	6	69
Accrued Taxes	125	143
Margin Deposit	25	(4)
Other Current Assets and Liabilities	160	163
Employee Benefit Plan Funding and Related Payments	(36)	(28)
Other	2	(11)
Net Cash Provided By (Used In) Operating Activities	1,140	1,197
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,053)	(1,062)
Purchase of Emissions Allowances and RECs	(17)	(15)
Proceeds from Sale of Available-for-Sale Securities	397	298
Investments in Available-for-Sale Securities	(407)	(307)
Other	7	7
Net Cash Provided By (Used In) Investing Activities	(1,073)	(1,079)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	52	(73)
Cash Dividends Paid on Common Stock	(227)	(218)
Other	(73)	(56)
Net Cash Provided By (Used In) Financing Activities	(248)	(347)
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(181)	(229)
Cash, Cash Equivalents and Restricted Cash	134	197
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(4)	(80)
Interest Paid, Net of Amounts Capitalized	73	77
Accrued Property, Plant and Equipment Expenditures	544	492
PSE And G [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	319	299
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	190	171
Provision for Deferred Income Taxes and ITC	40	160
Non-Cash Employee Benefit Plan Costs	9	13
Net Change in Regulatory Assets and Liabilities	(6)	(60)
Cost of Removal	(38)	(24)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	24	(34)
Fuel, Materials and Supplies	(2)	(7)
Prepayments	22	3
Accounts Payable	(12)	(12)
Accounts Receivable/Payable-Affiliated Companies, net	40	15
Other Current Assets and Liabilities	39	40
Employee Benefit Plan Funding and Related Payments	(33)	(25)
Other	(15)	(24)
Net Cash Provided By (Used In) Operating Activities	577	515
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(750)	(748)
Proceeds from Sale of Available-for-Sale Securities	5	10
Investments in Available-for-Sale Securities	(5)	(10)
Solar Loan Investments	(9)	(4)
Other	2	2
Net Cash Provided By (Used In) Investing Activities	(757)	(750)
CASH FLOWS FROM FINANCING ACTIVITIES
Other	0	(1)
Net Cash Provided By (Used In) Financing Activities	0	(1)
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(180)	(236)
Cash, Cash Equivalents and Restricted Cash	64	157
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	0	(26)
Interest Paid, Net of Amounts Capitalized	65	65
Accrued Property, Plant and Equipment Expenditures	326	287
Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	234	(170)
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	82	650
Amortization of Nuclear Fuel	50	54
Emission Allowances and Renewable Energy Credit Compliance Accrual	24	26
Provision for Deferred Income Taxes and ITC	33	(226)
Interest Accretion on Asset Retirement Obligations	10	8
Non-Cash Employee Benefit Plan Costs	6	7
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(119)	(5)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	12	(23)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	133	155
Margin Deposit	25	(4)
Accounts Receivable	93	24
Accounts Payable	(89)	(18)
Accounts Receivable/Payable-Affiliated Companies, net	25	71
Other Current Assets and Liabilities	30	33
Employee Benefit Plan Funding and Related Payments	(2)	(2)
Other	(5)	0
Net Cash Provided By (Used In) Operating Activities	542	580
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(299)	(307)
Purchase of Emissions Allowances and RECs	(17)	(15)
Proceeds from Sale of Available-for-Sale Securities	377	259
Investments in Available-for-Sale Securities	(389)	(268)
Short-Term Loan-Affiliated Company	0	70
Other	11	7
Net Cash Provided By (Used In) Investing Activities	(317)	(394)
CASH FLOWS FROM FINANCING ACTIVITIES
Short-Term Loan-Affiliated Company	(246)	0
Cash Dividends Paid on Common Stock	0	(175)
Other	0	(4)
Net Cash Provided By (Used In) Financing Activities	(246)	(179)
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(21)	7
Cash, Cash Equivalents and Restricted Cash	11	18
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	2	19
Interest Paid, Net of Amounts Capitalized	2	5
Accrued Property, Plant and Equipment Expenditures	$ 218	$ 205