Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	$ 618	$ 985
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	1,721	679
Amortization of Nuclear Fuel	152	154
Renewable Energy Credit Compliance Accrual	79	87
Impairment Costs for Early Plant Retirements	0	102
Provision for Deferred Income Taxes and ITC	227	445
Non-Cash Employee Benefit Plan Costs	67	95
Leveraged Lease Income, Adjusted for Rents Received and Deferred Taxes	(7)	(12)
Loss on Leases, net of tax	48	86
Net Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	8	96
Net Change in Other Regulatory Assets and Liabilities	(121)	(72)
Cost of Removal	(72)	(109)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(86)	(12)
Net Change in Certain Current Assets and Liabilities:
Tax Receivable	64	282
Accrued Taxes	115	202
Margin Deposit	64	(4)
Other Current Assets and Liabilities	(69)	(229)
Employee Benefit Plan Funding and Related Payments	(64)	(81)
Other	(10)	67
Net Cash Provided By (Used In) Operating Activities	2,734	2,761
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(3,046)	(2,985)
Purchase of Emissions Allowances and RECs	(90)	(77)
Proceeds from Sale of Available-for-Sale Securities	1,013	551
Investments in Available-for-Sale Securities	(1,029)	(576)
Other	48	33
Net Cash Provided By (Used In) Investing Activities	(3,104)	(3,054)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(186)	(109)
Issuance of Long-Term Debt	1,125	1,975
Redemption of Long-Term Debt	0	(824)
Cash Dividends Paid on Common Stock	(652)	(622)
Other	(62)	(71)
Net Cash Provided By (Used In) Financing Activities	225	349
Net Increase (Decrease) In Cash and Cash Equivalents	(145)	56
Cash and Cash Equivalents at Beginning of Period	423	394
Cash and Cash Equivalents at End of Period	278	450
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(16)	(274)
Interest Paid, Net of Amounts Capitalized	261	252
Accrued Property, Plant and Equipment Expenditures	604	579
PSE And G [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	753	696
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	506	412
Provision for Deferred Income Taxes and ITC	497	482
Non-Cash Employee Benefit Plan Costs	37	55
Net Change in Other Regulatory Assets and Liabilities	(121)	(72)
Cost of Removal	(72)	(109)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	136	2
Fuel, Materials and Supplies	(13)	(42)
Prepayments	(106)	(63)
Accounts Payable	(37)	(30)
Accounts Receivable/Payable-Affiliated Companies, net	(61)	154
Other Current Assets and Liabilities	(12)	(6)
Employee Benefit Plan Funding and Related Payments	(55)	(64)
Other	(59)	(14)
Net Cash Provided By (Used In) Operating Activities	1,393	1,401
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(2,118)	(2,035)
Proceeds from Sale of Available-for-Sale Securities	33	16
Investments in Available-for-Sale Securities	(34)	(17)
Change in Loan Principle for Solar Investments	(2)	0
Other	7	6
Net Cash Provided By (Used In) Investing Activities	(2,114)	(2,030)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Short-Term Debt	0	(153)
Issuance of Long-Term Debt	425	1,275
Redemption of Long-Term Debt	0	(271)
Proceeds from Contributed Capital	150	0
Other	(5)	(14)
Net Cash Provided By (Used In) Financing Activities	570	837
Net Increase (Decrease) In Cash and Cash Equivalents	(151)	208
Cash and Cash Equivalents at Beginning of Period	390	198
Cash and Cash Equivalents at End of Period	239	406
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(107)	(279)
Interest Paid, Net of Amounts Capitalized	208	194
Accrued Property, Plant and Equipment Expenditures	363	404
Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	(131)	320
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	1,191	245
Amortization of Nuclear Fuel	152	154
Renewable Energy Credit Compliance Accrual	79	87
Impairment Costs for Early Plant Retirements	0	102
Provision for Deferred Income Taxes and ITC	(259)	(34)
Interest Accretion on Asset Retirement Obligations	23	20
Non-Cash Employee Benefit Plan Costs	21	28
Net Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	8	96
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(86)	(12)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	(32)	(27)
Margin Deposit	64	(4)
Accounts Receivable	19	(11)
Accounts Payable	(32)	(29)
Accounts Receivable/Payable-Affiliated Companies, net	205	235
Other Current Assets and Liabilities	11	20
Employee Benefit Plan Funding and Related Payments	(5)	(10)
Other	21	80
Net Cash Provided By (Used In) Operating Activities	1,249	1,260
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(903)	(923)
Purchase of Emissions Allowances and RECs	(90)	(77)
Proceeds from Sale of Available-for-Sale Securities	886	490
Investments in Available-for-Sale Securities	(900)	(512)
Short-Term Loan-Affiliated Company, net	86	(151)
Other	37	22
Net Cash Provided By (Used In) Investing Activities	(884)	(1,151)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of Long-Term Debt	0	700
Redemption of Long-Term Debt	0	(553)
Cash Dividends Paid on Common Stock	(350)	(250)
Other	(4)	(6)
Net Cash Provided By (Used In) Financing Activities	(354)	(109)
Net Increase (Decrease) In Cash and Cash Equivalents	11	0
Cash and Cash Equivalents at Beginning of Period	11	12
Cash and Cash Equivalents at End of Period	22	12
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	75	(7)
Interest Paid, Net of Amounts Capitalized	30	51
Accrued Property, Plant and Equipment Expenditures	$ 241	$ 175