Condensed Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 1,051	$ 1,143
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Gain on Disposal of Discontinued Operations	0	(122)
Depreciation and Amortization	797	745
Amortization of Nuclear Fuel	129	114
Provision for Deferred Income Taxes (Other than Leases) and ITC	221	629
Non-Cash Employee Benefit Plan Costs	203	138
Leveraged Lease Income, Adjusted for Rents Received and Deferred Taxes	(81)	(16)
Leveraged Lease Reserve, net of tax	0	170
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	116	(14)
Over (Under) Recovery of Electric Energy Costs (BGS and NTC) and Gas Costs	46	100
Over (Under) Recovery of Societal Benefits Charge (SBC)	(51)	(26)
Market Transition Charge Refund	(23)	(47)
Cost of Removal	(71)	(43)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(107)	(110)
Net Change in Tax Receivable	16	312
Net Change in Certain Current Assets and Liabilities	305	(44)
Net Change in Certain Current Assets and Liabilities:
Employee Benefit Plan Funding and Related Payments	(193)	(486)
Other	(47)	(34)
Net Cash Provided By (Used In) Operating Activities	2,311	2,409
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,969)	(1,479)
Proceeds from Sale of Discontinued Operations	0	687
Proceeds from Sale of Available-for-Sale Securities	1,473	1,088
Investments in Available-for-Sale Securities	(1,497)	(1,110)
Other	(58)	(13)
Net Cash Provided By (Used In) Investing Activities	(2,051)	(827)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	0	(64)
Issuance of Long-Term Debt	850	750
Redemption of Long-Term Debt	(439)	(606)
Repayment of Non-Recourse Debt	(1)	(1)
Redemption of Securitization Debt	(154)	(147)
Cash Dividend Paid on Common Stock	(538)	(520)
Other	(32)	(32)
Net Cash Provided By (Used In) Financing Activities	(314)	(620)
Net Increase (Decrease) In Cash and Cash Equivalents	(54)	962
Cash and Cash Equivalents at Beginning of Period	834	280
Cash and Cash Equivalents at End of Period	780	1,242
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	109	60
Interest Paid, Net of Amounts Capitalized	280	341
Accrued Property, Plant and Equipment Expenditures	259	211
Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	538	871
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Gain on Disposal of Discontinued Operations	0	(122)
Depreciation and Amortization	175	173
Amortization of Nuclear Fuel	129	114
Provision for Deferred Income Taxes (Other than Leases) and ITC	189	74
Non-Cash Employee Benefit Plan Costs	53	33
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	116	(14)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(107)	(110)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	(10)	(82)
Margin Deposit	(107)	(63)
Accounts Receivable	50	157
Accounts Payable	(31)	(103)
Accounts Receivable/Payable-Affiliated Companies, net	193	650
Accrued Interest Payable	17	23
Other Current Assets and Liabilities	2	48
Employee Benefit Plan Funding and Related Payments	(40)	(127)
Other	5	(35)
Net Cash Provided By (Used In) Operating Activities	1,172	1,487
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(493)	(530)
Proceeds from Sale of Discontinued Operations	0	687
Proceeds from Sale of Available-for-Sale Securities	1,295	1,088
Investments in Available-for-Sale Securities	(1,315)	(1,106)
Short-Term Loan-Affiliated Company, net	17	(1,176)
Other	(10)	19
Net Cash Provided By (Used In) Investing Activities	(506)	(1,018)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of Long-Term Debt	0	500
Redemption of Long-Term Debt	(66)	(606)
Cash Dividend Paid on Common Stock	(600)	(350)
Other	(7)	(10)
Net Cash Provided By (Used In) Financing Activities	(673)	(466)
Net Increase (Decrease) In Cash and Cash Equivalents	(7)	3
Cash and Cash Equivalents at Beginning of Period	12	11
Cash and Cash Equivalents at End of Period	5	14
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	130	110
Interest Paid, Net of Amounts Capitalized	73	111
Accrued Property, Plant and Equipment Expenditures	84	86
PSE And G [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	453	422
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	594	548
Provision for Deferred Income Taxes (Other than Leases) and ITC	131	563
Non-Cash Employee Benefit Plan Costs	134	92
Over (Under) Recovery of Electric Energy Costs (BGS and NTC) and Gas Costs	46	100
Over (Under) Recovery of Societal Benefits Charge (SBC)	(51)	(26)
Market Transition Charge Refund	(23)	(47)
Cost of Removal	(71)	(43)
Net Change in Tax Receivable	16	(21)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	97	261
Fuel, Materials and Supplies	(11)	(1)
Prepayments	(28)	(203)
Accounts Receivable/Payable-Affiliated Companies, net	(41)	(381)
Other Current Assets and Liabilities	2	(66)
Employee Benefit Plan Funding and Related Payments	(137)	(311)
Other	(70)	(15)
Net Cash Provided By (Used In) Operating Activities	1,041	872
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,369)	(939)
Proceeds from Sale of Available-for-Sale Securities	73	0
Investments in Available-for-Sale Securities	(73)	0
Solar Loan Investments	(56)	(34)
Restricted Funds	1	(1)
Net Cash Provided By (Used In) Investing Activities	(1,424)	(974)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of Long-Term Debt	850	250
Redemption of Long-Term Debt	(373)	0
Redemption of Securitization Debt	(154)	(147)
Deferred Issuance Costs	(12)	(4)
Net Cash Provided By (Used In) Financing Activities	311	99
Net Increase (Decrease) In Cash and Cash Equivalents	(72)	(3)
Cash and Cash Equivalents at Beginning of Period	143	245
Cash and Cash Equivalents at End of Period	71	242
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(30)	(44)
Interest Paid, Net of Amounts Capitalized	205	225
Accrued Property, Plant and Equipment Expenditures	$ 175	$ 125