Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating Revenues:
Electric	[1]	$ 621	$ 553	$ 141	$ 1,100
Gas		77	79	222	234
Total operating revenues		698	632	363	1,334
Operating Expenses
Fuel used in electric generation	[1]	143	155	280	315
Purchased power	[1]	12	15	20	67
Gas purchased for resale	[1]	44	45	121	121
Other operations and maintenance		123	113	219	215
Other operations and maintenance - affiliated suppliers		72	51	120	95
Impairment of assets and other charges		100	0	371	4
Depreciation and amortization		115	81	217	161
Other taxes	[1]	72	65	141	129
Total operating expenses		681	525	1,489	1,107
Operating income (loss)		17	107	(1,126)	227
Other income (expense), net		(9)	2	(14)	125
Interest charges, net of allowance for borrowed funds used during construction		63	76	136	152
Income (loss) before income tax expense (benefit)		(55)	33	(1,276)	200
Income tax expense (benefit)		15	2	(103)	41
Net Income (Loss) and Other Comprehensive Income (Loss)		(70)	31	(1,173)	159
Comprehensive Income Attributable to Noncontrolling Interest		8	5	14	9
Comprehensive Income (Loss) Available (Attributable) to Common Shareholder		$ (78)	$ 26	$ (1,187)	$ 150

[1] See Note 14 for amounts attributable to affiliates.