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EQUITY - UNVESTED RSU TRANSACTIONS (Details) - Restricted Stock Units (RSUs)
shares in Millions
12 Months Ended
Dec. 31, 2019
$ / shares
shares
Shares  
Beginning Balance, Unvested (in shares) | shares 1.5
Granted (in shares) | shares 3.7
Vested (in shares) | shares (0.4)
Forfeited (in shares) | shares (0.3)
Ending Balance, Unvested (in shares) | shares 4.5
Weighted Average Grant Date Fair Value  
Beginning Balance, Unvested (in dollars per share) | $ / shares $ 56.93
Granted (in dollars per share) | $ / shares 45.69
Vested (in dollars per share) | $ / shares 54.60
Forfeited (in dollars per share) | $ / shares 55.99
Ending Balance, Unvested (in dollars per share) | $ / shares $ 47.79