Condensed Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Revenues	$ 2,818	$ 2,591
Operating Expenses [Abstract]
Energy Costs	952	868
Operation and Maintenance	754	717
Depreciation and Amortization	280	828
Total Operating Expenses	1,986	2,413
OPERATING INCOME (LOSS)	832	178
Income from Equity Method Investments	2	3
Net Gains (Losses) on Trust Investments	(22)	28
Other Income (Deductions)	32	32
Non-Operating Pension and OPEB Credits (Costs)	19	0
Interest Expense	(103)	(98)
Income Before Income Taxes	760	143
Income Tax Benefit (Expense)	(202)	(29)
Net Income (Loss)	$ 558	$ 114
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC (shares)	504	505
DILUTED (shares)	507	508
EARNINGS PER SHARE:
BASIC (dollars per share)	$ 1.11	$ 0.23
DILUTED (dollars per share)	1.10	0.22
DIVIDENDS PAID PER SHARE OF COMMON STOCK (in dollars per share)	$ 0.45	$ 0.43
PSE And G [Member]
Operating Revenues	$ 1,845	$ 1,826
Operating Expenses [Abstract]
Energy Costs	782	762
Operation and Maintenance	391	370
Depreciation and Amortization	190	171
Total Operating Expenses	1,363	1,303
OPERATING INCOME (LOSS)	482	523
Net Gains (Losses) on Trust Investments	0	2
Other Income (Deductions)	20	22
Non-Operating Pension and OPEB Credits (Costs)	15	(2)
Interest Expense	(81)	(75)
Income Before Income Taxes	436	470
Income Tax Benefit (Expense)	(117)	(171)
Net Income (Loss)	319	299
Power [Member]
Operating Revenues	1,403	1,269
Operating Expenses [Abstract]
Energy Costs	746	692
Operation and Maintenance	246	232
Depreciation and Amortization	82	650
Total Operating Expenses	1,074	1,574
OPERATING INCOME (LOSS)	329	(305)
Income from Equity Method Investments	2	3
Net Gains (Losses) on Trust Investments	(22)	19
Other Income (Deductions)	11	11
Non-Operating Pension and OPEB Credits (Costs)	4	2
Interest Expense	(7)	(16)
Income Before Income Taxes	317	(286)
Income Tax Benefit (Expense)	(83)	116
Net Income (Loss)	$ 234	$ (170)