Consolidated Balance Sheet (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Treasury stock (in shares)	872,791,028	872,791,028
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	7,500,000,000	7,500,000,000
Common stock, shares issued (in shares)	5,396,576,978	5,444,002,825
Common stock, shares outstanding (in shares)	4,523,785,950	4,571,211,797
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	9,444,375	9,444,375
Common stock, shares outstanding (in shares)	9,444,375	9,444,375