Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

v3.19.3.a.u2
CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares
shares in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Treasury stock, shares 0 1    
Common Stock | Class A Common Stock:        
Common stock, shares issued 156 163 173 180
Common Stock | Class B Common Stock:        
Common stock, shares issued 701 696 687 689