Common Equity (Common Share Activity) (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Stock Oustanding [Roll Forward]
Shares outstanding, January 1 (in shares)	249,868,415	245,022,800	236,063,279
Common stock issued during the period, Shareowner Direct Plan (in shares)	492,565	472,283	501,808
Common stock issued during the period, Equity-based compensation plans (in shares)	113,549	98,205	101,478
Common stock issued during the period, Other (in shares)	0	0	(2,738)
Shares outstanding, December 31 (in shares)	250,474,529	249,868,415	245,022,800
Equity Forward Agreements [Member]
Common Stock Oustanding [Roll Forward]
Common stock issued during the period (in shares)	0	4,275,127	8,358,973