Equity (Weighted Average Common Shares Outstanding) (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity [Abstract]
Weighted-average number of common shares outstanding – basic	4,584	4,574	4,548
Effect of dilutive securities	70	50	62
Weighted-average number of common shares outstanding – diluted	4,654	4,624	4,610