Condensed Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating Revenues	$ 2,450	$ 2,688	$ 6,971	$ 8,137
Operating Expenses [Abstract]
Energy Costs	866	815	2,326	2,577
Operation and Maintenance	776	746	2,215	2,170
Depreciation and Amortization	231	313	679	960
Total Operating Expenses	1,873	1,874	5,220	5,707
OPERATING INCOME	577	814	1,751	2,430
Income from Equity Method Investments	3	3	9	10
Other Income	47	47	139	171
Other Deductions	(8)	(14)	(39)	(36)
Other-Than-Temporary Impairments	(5)	(30)	(25)	(45)
Interest Expense	(99)	(96)	(288)	(291)
INCOME BEFORE INCOME TAXES	515	724	1,547	2,239
Income Tax Expense	(188)	(285)	(562)	(869)
Net Income	$ 327	$ 439	$ 985	$ 1,370
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC (in shares)	505	505	505	505
DILUTED (in shares)	508	508	508	508
EARNINGS PER SHARE:
BASIC (in dollars per share)	$ 0.65	$ 0.87	$ 1.95	$ 2.71
DILUTED (in dollars per share)	0.64	0.87	1.94	2.70
DIVIDENDS PAID PER SHARE OF COMMON STOCK (in dollars per share)	$ 0.41	$ 0.39	$ 1.23	$ 1.17
PSE And G [Member]
Operating Revenues	$ 1,684	$ 1,766	$ 4,746	$ 5,234
Operating Expenses [Abstract]
Energy Costs	721	740	1,979	2,176
Operation and Maintenance	376	391	1,110	1,171
Depreciation and Amortization	137	231	412	712
Total Operating Expenses	1,234	1,362	3,501	4,059
OPERATING INCOME	450	404	1,245	1,175
Other Income	22	22	61	59
Other Deductions	(1)	0	(3)	(2)
Interest Expense	(72)	(67)	(214)	(203)
INCOME BEFORE INCOME TAXES	399	359	1,089	1,029
Income Tax Expense	(144)	(137)	(393)	(398)
Net Income	255	222	696	631
Power [Member]
Operating Revenues	1,075	1,096	3,102	3,846
Operating Expenses [Abstract]
Energy Costs	462	367	1,481	1,669
Operation and Maintenance	289	263	807	748
Depreciation and Amortization	86	75	245	226
Total Operating Expenses	837	705	2,533	2,643
OPERATING INCOME	238	391	569	1,203
Income from Equity Method Investments	3	3	9	11
Other Income	23	25	74	109
Other Deductions	(6)	(14)	(33)	(32)
Other-Than-Temporary Impairments	(5)	(30)	(25)	(45)
Interest Expense	(24)	(30)	(66)	(94)
INCOME BEFORE INCOME TAXES	229	345	528	1,152
Income Tax Expense	(90)	(139)	(208)	(445)
Net Income	$ 139	$ 206	$ 320	$ 707