Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	$ 114	$ 471
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	828	224
Amortization of Nuclear Fuel	54	58
Renewable Energy Credit Compliance Accrual	26	27
Provision for Deferred Income Taxes and ITC	(85)	182
Non-Cash Employee Benefit Plan Costs	23	32
Leveraged Lease Income, Adjusted for Rents Received and Deferred Taxes	(15)	(15)
Loss on Leases, net of tax	32	0
Net Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(5)	(21)
Net Change in Other Regulatory Assets and Liabilities	(60)	(105)
Cost of Removal	(24)	(35)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(23)	3
Net Change in Certain Current Assets and Liabilities:
Tax Receivable	69	301
Accrued Taxes	143	144
Margin Deposit	(4)	(4)
Other Current Assets and Liabilities	163	27
Employee Benefit Plan Funding and Related Payments	(28)	(56)
Other	(12)	(19)
Net Cash Provided By (Used In) Operating Activities	1,196	1,214
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,062)	(1,065)
Purchase of Emissions Allowances and RECs	(15)	(16)
Proceeds from Sale of Available-for-Sale Securities	298	202
Investments in Available-for-Sale Securities	(307)	(207)
Other	7	5
Net Cash Provided By (Used In) Investing Activities	(1,079)	(1,081)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(73)	(352)
Issuance of Long-Term Debt	0	850
Redemption of Long-Term Debt	0	(171)
Cash Dividends Paid on Common Stock	(218)	(207)
Other	(56)	(55)
Net Cash Provided By (Used In) Financing Activities	(347)	65
Net Increase (Decrease) In Cash and Cash Equivalents	(230)	198
Cash and Cash Equivalents at Beginning of Period	423	394
Cash and Cash Equivalents at End of Period	193	592
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(80)	(299)
Interest Paid, Net of Amounts Capitalized	77	66
Accrued Property, Plant and Equipment Expenditures	492	434
PSE And G [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	299	262
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	171	139
Provision for Deferred Income Taxes and ITC	160	147
Non-Cash Employee Benefit Plan Costs	13	18
Net Change in Other Regulatory Assets and Liabilities	(60)	(105)
Cost of Removal	(24)	(35)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	(34)	(26)
Fuel, Materials and Supplies	(7)	(6)
Prepayments	3	26
Accounts Payable	(12)	(24)
Accounts Receivable/Payable-Affiliated Companies, net	15	197
Other Current Assets and Liabilities	40	35
Employee Benefit Plan Funding and Related Payments	(25)	(44)
Other	(25)	(16)
Net Cash Provided By (Used In) Operating Activities	514	568
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(748)	(724)
Proceeds from Sale of Available-for-Sale Securities	10	5
Investments in Available-for-Sale Securities	(10)	(5)
Issuance Of Loans For Solar Investments	(4)	0
Other	2	0
Net Cash Provided By (Used In) Investing Activities	(750)	(724)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Short-Term Debt	0	(153)
Issuance of Long-Term Debt	0	850
Redemption of Long-Term Debt	0	(171)
Other	(1)	(10)
Net Cash Provided By (Used In) Financing Activities	(1)	516
Net Increase (Decrease) In Cash and Cash Equivalents	(237)	360
Cash and Cash Equivalents at Beginning of Period	390	198
Cash and Cash Equivalents at End of Period	153	558
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(26)	(200)
Interest Paid, Net of Amounts Capitalized	65	53
Accrued Property, Plant and Equipment Expenditures	287	318
Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	(170)	192
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	650	79
Amortization of Nuclear Fuel	54	58
Renewable Energy Credit Compliance Accrual	26	27
Provision for Deferred Income Taxes and ITC	(226)	34
Interest Accretion on Asset Retirement Obligations	8	7
Non-Cash Employee Benefit Plan Costs	7	10
Net Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(5)	(21)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(23)	3
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	155	143
Margin Deposit	(4)	(4)
Accounts Receivable	24	(41)
Accounts Payable	(18)	(34)
Accounts Receivable/Payable-Affiliated Companies, net	71	184
Other Current Assets and Liabilities	33	15
Employee Benefit Plan Funding and Related Payments	(2)	(8)
Other	0	19
Net Cash Provided By (Used In) Operating Activities	580	663
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(307)	(333)
Purchase of Emissions Allowances and RECs	(15)	(16)
Proceeds from Sale of Available-for-Sale Securities	259	183
Investments in Available-for-Sale Securities	(268)	(188)
Short-Term Loan-Affiliated Company, net	(70)	(309)
Other	7	4
Net Cash Provided By (Used In) Investing Activities	(394)	(659)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash Dividends Paid on Common Stock	(175)	0
Other	(4)	0
Net Cash Provided By (Used In) Financing Activities	(179)	0
Net Increase (Decrease) In Cash and Cash Equivalents	7	4
Cash and Cash Equivalents at Beginning of Period	11	12
Cash and Cash Equivalents at End of Period	18	16
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	19	(100)
Interest Paid, Net of Amounts Capitalized	5	11
Accrued Property, Plant and Equipment Expenditures	$ 205	$ 116