Common Equity (Common Share Activity) (Details)	6 Months Ended
	Jun. 30, 2016 shares
Common Stock Oustanding [Roll Forward]
Shares outstanding, January 1, 2016 (in shares)	226,918,432
Shareowner Direct Plan issuances (in shares)	392,906
Equity-based compensation plans (in shares)	22,408
Shares outstanding, June 30, 2016 (in shares)	227,333,746