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COMMON STOCK (Tables)
9 Months Ended
Sep. 30, 2021
Accounting Policies [Abstract]  
Schedule of Stock by Class
 Shares of Common Stock Outstanding
 Class A
Common Stock
Class B
Common Stock
Balance at December 31, 2020290,573,672 185,895,903 
Conversion of Class B common stock to Class A common stock107,671 (107,671)
Option exercises1,080,548 — 
Repurchase and retirement of Class A common shares in connection with the Company's share repurchase plan (discussed above)(23,593,728)— 
Treasury shares reissued696,884 — 
Balance at September 30, 2021268,865,047 185,788,232