Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

v3.21.2
CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares
Jun. 30, 2021
Dec. 31, 2020
Treasury stock, shares 300,000 400,000
Class A common stock    
Common stock, shares issued 144,000,000 147,000,000
Class B common stock    
Common stock, shares issued 728,000,000 718,000,000