CONDENSED STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (Parentheticals) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Tax benefit (expense) on adjustment related to pension and postretirement plans	$ 0	$ (1)	$ (2)	$ (2)
Tax expense (benefit) on net deferred gain (loss) from cash flow hedges	0	(1)	0	(2)
Tax expense (benefit) on reclassification of deferred (gain) loss from cash flow hedges realized in net income	0	0	0	0
Tax benefit (expense) on Other comprehensive loss from unconsolidated affiliates	0	0	0	0
Houston Electric [Member]
Tax expense (benefit) on net deferred gain (loss) from cash flow hedges	$ 0	$ 1	$ 0	$ 2