Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	$ 223	$ 658
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	1,469	448
Amortization of Nuclear Fuel	101	105
Renewable Energy Credit Compliance Accrual	51	50
Provision for Deferred Income Taxes and ITC	91	334
Non-Cash Employee Benefit Plan Costs	45	63
Leveraged Lease Income, Adjusted for Rents Received and Deferred Taxes	(30)	(30)
Loss on Leases, net of tax	45	0
Net Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(42)	153
Net Change in Other Regulatory Assets and Liabilities	(124)	(125)
Cost of Removal	(47)	(74)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(58)	(2)
Net Change in Certain Current Assets and Liabilities:
Tax Receivable	69	301
Accrued Taxes	15	94
Margin Deposit	59	(46)
Other Current Assets and Liabilities	(56)	(120)
Employee Benefit Plan Funding and Related Payments	(49)	(78)
Other	(6)	(9)
Net Cash Provided By (Used In) Operating Activities	1,756	1,722
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,981)	(1,971)
Purchase of Emissions Allowances and RECs	(29)	(36)
Proceeds from Sale of Available-for-Sale Securities	711	392
Investments in Available-for-Sale Securities	(726)	(407)
Other	36	18
Net Cash Provided By (Used In) Investing Activities	(1,989)	(2,004)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(388)	(364)
Issuance of Long-Term Debt	1,125	1,550
Redemption of Long-Term Debt	0	(171)
Cash Dividends Paid on Common Stock	(435)	(415)
Other	(62)	(64)
Net Cash Provided By (Used In) Financing Activities	240	536
Net Increase (Decrease) In Cash and Cash Equivalents	7	254
Cash and Cash Equivalents at Beginning of Period	423	394
Cash and Cash Equivalents at End of Period	430	648
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(30)	(276)
Interest Paid, Net of Amounts Capitalized	189	176
Accrued Property, Plant and Equipment Expenditures	513	513
PSE And G [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	507	441
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	337	275
Provision for Deferred Income Taxes and ITC	330	290
Non-Cash Employee Benefit Plan Costs	25	36
Net Change in Other Regulatory Assets and Liabilities	(124)	(125)
Cost of Removal	(47)	(74)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	108	50
Fuel, Materials and Supplies	(15)	(14)
Prepayments	(184)	(165)
Accounts Payable	(30)	(29)
Accounts Receivable/Payable-Affiliated Companies, net	(72)	181
Other Current Assets and Liabilities	16	17
Employee Benefit Plan Funding and Related Payments	(42)	(62)
Other	(39)	(13)
Net Cash Provided By (Used In) Operating Activities	770	808
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,389)	(1,355)
Proceeds from Sale of Available-for-Sale Securities	28	12
Investments in Available-for-Sale Securities	(29)	(13)
Change in Loan Principle for Solar Investments	(3)	2
Other	5	0
Net Cash Provided By (Used In) Investing Activities	(1,388)	(1,354)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Short-Term Debt	0	(153)
Issuance of Long-Term Debt	425	850
Redemption of Long-Term Debt	0	(171)
Other	(5)	(10)
Net Cash Provided By (Used In) Financing Activities	420	516
Net Increase (Decrease) In Cash and Cash Equivalents	(198)	(30)
Cash and Cash Equivalents at Beginning of Period	390	198
Cash and Cash Equivalents at End of Period	192	168
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(75)	(255)
Interest Paid, Net of Amounts Capitalized	144	134
Accrued Property, Plant and Equipment Expenditures	319	381
Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	(267)	181
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	1,115	159
Amortization of Nuclear Fuel	101	105
Renewable Energy Credit Compliance Accrual	51	50
Provision for Deferred Income Taxes and ITC	(226)	37
Interest Accretion on Asset Retirement Obligations	15	13
Non-Cash Employee Benefit Plan Costs	14	19
Net Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(42)	153
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(58)	(2)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	58	86
Margin Deposit	59	(46)
Accounts Receivable	36	(12)
Accounts Payable	(14)	(10)
Accounts Receivable/Payable-Affiliated Companies, net	75	179
Other Current Assets and Liabilities	7	11
Employee Benefit Plan Funding and Related Payments	(4)	(10)
Other	12	4
Net Cash Provided By (Used In) Operating Activities	932	917
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(576)	(598)
Purchase of Emissions Allowances and RECs	(29)	(36)
Proceeds from Sale of Available-for-Sale Securities	602	346
Investments in Available-for-Sale Securities	(616)	(359)
Short-Term Loan-Affiliated Company, net	(146)	(972)
Other	30	12
Net Cash Provided By (Used In) Investing Activities	(735)	(1,607)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of Long-Term Debt	0	700
Cash Dividends Paid on Common Stock	(175)	0
Other	(4)	(6)
Net Cash Provided By (Used In) Financing Activities	(179)	694
Net Increase (Decrease) In Cash and Cash Equivalents	18	4
Cash and Cash Equivalents at Beginning of Period	11	12
Cash and Cash Equivalents at End of Period	29	16
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	66	(53)
Interest Paid, Net of Amounts Capitalized	29	38
Accrued Property, Plant and Equipment Expenditures	$ 194	$ 132