Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Electric	$ 1,961	$ 2,063	$ 2,052
Gas	443	461	418
Total revenues	2,404	2,524	2,470
Expenses
Fuel	516	551	588
Purchased power	49	59	46
Cost of natural gas sold	152	180	153
Operations & maintenance	543	632	513
Depreciation and amortization	377	372	350
Taxes, other than income	206	208	198
Total expenses	1,843	2,002	1,848
Income from operations	561	522	622
Other income
Allowance for other funds used during construction	11	10	2
Other income, net	9	8	8
Total other income	20	18	10
Interest charges
Interest expense	139	123	120
Allowance for borrowed funds used during construction	(5)	(5)	(1)
Total interest charges	134	118	119
Income before provision for income taxes	447	422	513
Provision for income taxes	77	81	197
Net income	370	341	316
Other comprehensive income, net of tax
Gain on cash flow hedges	0	1	1
Total other comprehensive income, net of tax	0	1	1
Comprehensive income	$ 370	$ 342	$ 317