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STOCK PROGRAMS - Long-term Performance Share Units (Details) - Executive Officer - Long Term Performance Shares - Employee - Common Class A
$ in Millions
1 Months Ended
Mar. 31, 2021
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award  
Payout for performance share units in Class A Common Stock (in shares) | shares 68,578
Grant date fair value $ 20
Unrecognized compensation cost $ 20
Recognition period 3 years 3 months 18 days