Common Equity (Common Share Activity) (Details)	6 Months Ended
	Jun. 30, 2019 shares
Common Stock Oustanding [Roll Forward]
Shares outstanding, January 1, 2019 (in shares)	236,063,279
Shareowner Direct Plan issuances (in shares)	268,755
Equity-based compensation plans (in shares)	101,478
Other (in shares)	(2,738)
Shares outstanding, June 30, 2019 (in shares)	237,521,074
Equity Forward Agreements [Member]
Common Stock Oustanding [Roll Forward]
Equity forward agreements (in shares)	1,090,300