Common Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Common Equity [Line Items]
Shares available for issuance under the 2020 OIP, Shareowner Direct Plan and 401(k) Savings Plan (in shares)	14,000,000
Proceeds from issuance of common stock, net	$ 28	$ 247	$ 390
Equity Forward Agreements [Member]
Schedule of Common Equity [Line Items]
Common stock issued during the period (in shares)	0	4,275,127	8,358,973
Proceeds from issuance of common stock, net		$ 222	$ 366
Initial forward sale price (in dollars per share)		$ 51.98	$ 43.75