Condensed Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Revenues	$ 2,592	$ 2,616
Operating Expenses [Abstract]
Energy Costs	874	836
Operation and Maintenance	712	729
Depreciation and Amortization	828	224
Total Operating Expenses	2,414	1,789
OPERATING INCOME (LOSS)	178	827
Income from Equity Method Investments	3	2
Other Income	72	48
Other Deductions	(11)	(21)
Other-Than-Temporary Impairments	(1)	(10)
Interest Expense	(98)	(92)
INCOME (LOSS) BEFORE INCOME TAXES	143	754
Income Tax Benefit (Expense)	(29)	(283)
Net Income (Loss)	$ 114	$ 471
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC (in shares)	505	505
DILUTED (in shares)	508	508
EARNINGS PER SHARE:
BASIC (in dollars per share)	$ 0.23	$ 0.93
DILUTED (in dollars per share)	0.22	0.93
DIVIDENDS PAID PER SHARE OF COMMON STOCK (in dollars per share)	$ 0.43	$ 0.41
PSE And G [Member]
Operating Revenues	$ 1,812	$ 1,712
Operating Expenses [Abstract]
Energy Costs	753	729
Operation and Maintenance	367	382
Depreciation and Amortization	171	139
Total Operating Expenses	1,291	1,250
OPERATING INCOME (LOSS)	521	462
Other Income	25	20
Other Deductions	(1)	(1)
Interest Expense	(75)	(68)
INCOME (LOSS) BEFORE INCOME TAXES	470	413
Income Tax Benefit (Expense)	(171)	(151)
Net Income (Loss)	299	262
Power [Member]
Operating Revenues	1,284	1,313
Operating Expenses [Abstract]
Energy Costs	707	638
Operation and Maintenance	230	253
Depreciation and Amortization	650	79
Total Operating Expenses	1,587	970
OPERATING INCOME (LOSS)	(303)	343
Income from Equity Method Investments	3	2
Other Income	38	26
Other Deductions	(7)	(18)
Other-Than-Temporary Impairments	(1)	(10)
Interest Expense	(16)	(22)
INCOME (LOSS) BEFORE INCOME TAXES	(286)	321
Income Tax Benefit (Expense)	116	(129)
Net Income (Loss)	$ (170)	$ 192