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STOCK COMPENSATION - UNVESTED RSU TRANSACTIONS (Details) - Restricted Stock Units (RSUs)
shares in Millions
12 Months Ended
Dec. 31, 2021
$ / shares
shares
Shares  
Beginning balance, unvested (in shares) | shares 4.2
Granted (in shares) | shares 1.0
Vested (in shares) | shares (1.5)
Forfeited (in shares) | shares (0.6)
Ending balance, unvested (in shares) | shares 3.1
Weighted Average Grant Date Fair Value  
Beginning balance, unvested (in dollars per share) | $ / shares $ 47.29
Granted (in dollars per share) | $ / shares 63.61
Vested (in dollars per share) | $ / shares 45.08
Forfeited (in dollars per share) | $ / shares 50.01
Ending balance, unvested (in dollars per share) | $ / shares $ 53.52