Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	$ 827	$ 223
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	560	1,469
Amortization of Nuclear Fuel	95	101
Emission Allowances and Renewable Energy Credit Compliance Accrual	46	51
Provision for Deferred Income Taxes and ITC	213	91
Non-Cash Employee Benefit Plan Costs	35	45
Leveraged Lease Income, Adjusted for Rents Received and Deferred Taxes	8	(30)
Loss on Leases, net of tax	14	45
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(54)	(42)
Net Change in Regulatory Assets and Liabilities	(58)	(124)
Cost of Removal	(84)	(47)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(8)	(58)
Net Change in Certain Current Assets and Liabilities:
Tax Receivable	16	69
Accrued Taxes	57	15
Margin Deposit	24	59
Other Current Assets and Liabilities	2	(58)
Employee Benefit Plan Funding and Related Payments	(58)	(49)
Other	(2)	(5)
Net Cash Provided By (Used In) Operating Activities	1,633	1,755
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(2,005)	(1,981)
Purchase of Emissions Allowances and RECs	(44)	(29)
Proceeds from Sale of Available-for-Sale Securities	821	711
Investments in Available-for-Sale Securities	(829)	(726)
Other	30	36
Net Cash Provided By (Used In) Investing Activities	(2,027)	(1,989)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(272)	(388)
Proceeds from Issuance of Other Long-term Debt	1,400	1,125
Repayments of Other Long-term Debt	400	0
Cash Dividends Paid on Common Stock	(455)	(435)
Other	(83)	(62)
Net Cash Provided By (Used In) Financing Activities	190	240
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(204)	6
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	315	426
Cash, Cash Equivalents and Restricted Cash at End of Period	111	432
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	52	(30)
Interest Paid, Net of Amounts Capitalized	205	189
Accrued Property, Plant and Equipment Expenditures	625	513
PSE And G [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	550	507
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	377	337
Provision for Deferred Income Taxes and ITC	160	330
Non-Cash Employee Benefit Plan Costs	19	25
Net Change in Regulatory Assets and Liabilities	(58)	(124)
Cost of Removal	(84)	(47)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	195	108
Fuel, Materials and Supplies	2	(15)
Prepayments	(161)	(184)
Accounts Payable	(30)	(30)
Accounts Receivable/Payable-Affiliated Companies, net	(204)	(72)
Other Current Assets and Liabilities	66	14
Employee Benefit Plan Funding and Related Payments	(50)	(42)
Other	(20)	(38)
Net Cash Provided By (Used In) Operating Activities	762	769
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,447)	(1,389)
Proceeds from Sale of Available-for-Sale Securities	9	28
Investments in Available-for-Sale Securities	(10)	(29)
Solar Loan Investments	(11)	(3)
Other	3	5
Net Cash Provided By (Used In) Investing Activities	(1,456)	(1,388)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	195	0
Proceeds from Issuance of Other Long-term Debt	700	425
Repayments of Other Long-term Debt	400	0
Other	(9)	(5)
Net Cash Provided By (Used In) Financing Activities	486	420
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(208)	(199)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	244	393
Cash, Cash Equivalents and Restricted Cash at End of Period	36	194
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	97	(75)
Interest Paid, Net of Amounts Capitalized	157	144
Accrued Property, Plant and Equipment Expenditures	436	319
Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	275	(267)
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	166	1,115
Amortization of Nuclear Fuel	95	101
Emission Allowances and Renewable Energy Credit Compliance Accrual	46	51
Provision for Deferred Income Taxes and ITC	51	(226)
Interest Accretion on Asset Retirement Obligations	20	15
Non-Cash Employee Benefit Plan Costs	11	14
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(54)	(42)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(8)	(58)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	71	58
Margin Deposit	24	59
Accounts Receivable	84	36
Accounts Payable	(90)	(14)
Accounts Receivable/Payable-Affiliated Companies, net	227	75
Other Current Assets and Liabilities	(35)	7
Employee Benefit Plan Funding and Related Payments	(5)	(4)
Other	(9)	12
Net Cash Provided By (Used In) Operating Activities	869	932
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(547)	(576)
Purchase of Emissions Allowances and RECs	(44)	(29)
Proceeds from Sale of Available-for-Sale Securities	785	602
Investments in Available-for-Sale Securities	(793)	(616)
Short-Term Loan-Affiliated Company	519	146
Other	23	30
Net Cash Provided By (Used In) Investing Activities	(1,095)	(735)
CASH FLOWS FROM FINANCING ACTIVITIES
Short-Term Loan-Affiliated Company	(281)	0
Proceeds from Issuance of Other Long-term Debt	700	0
Cash Dividends Paid on Common Stock	(200)	(175)
Other	(5)	(4)
Net Cash Provided By (Used In) Financing Activities	214	(179)
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(12)	18
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	32	11
Cash, Cash Equivalents and Restricted Cash at End of Period	20	29
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(72)	66
Interest Paid, Net of Amounts Capitalized	18	29
Accrued Property, Plant and Equipment Expenditures	$ 189	$ 194