Common Equity (Common Share Activity) (Details) - shares	3 Months Ended	9 Months Ended
	Mar. 31, 2020	Sep. 30, 2020
Common Stock Oustanding [Roll Forward]
Shares outstanding, January 1, 2020 (in shares)	245,022,800	245,022,800
Shareowner Direct Plan (in shares)		364,531
Equity-based compensation plans (in shares)		98,205
Shares outstanding, September 30, 2020 (in shares)		249,760,663
Equity Forward Agreements [Member]
Common Stock Oustanding [Roll Forward]
Equity forward agreements (in shares)	4,275,127	4,275,127