Operating Segments (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

(millions)	External Revenue			Comprehensive Income (Loss) Available (Attributable) to Common Shareholder
Three Months Ended June 30, 2019
Electric Operations	$	620		$	104
Gas Distribution		78			(8	)
Corporate and Other		—			(166	)
Adjustments/Eliminations		—			(8	)
Consolidated Total	$	698		$	(78	)
Three Months Ended June 30, 2018
Electric Operations	$	553		$	30
Gas Distribution		79			(3	)
Corporate and Other		—			4
Adjustments/Eliminations		—			(5	)
Consolidated Total	$	632		$	26
Six Months Ended June 30, 2019
Electric Operations	$	1,147		$	152
Gas Distribution		225			14
Corporate and Other		(1,009	)		(1,339	)
Adjustments/Eliminations		—			(14	)
Consolidated Total	$	363		$	(1,187	)
Six Months Ended June 30, 2018
Electric Operations	$	1,100		$	130
Gas Distribution		234			29
Corporate and Other		—			—
Adjustments/Eliminations		—			(9	)
Consolidated Total	$	1,334		$	150