Annual report pursuant to Section 13 and 15(d)

SHARE-BASED COMPENSATION - Schedule of Stock Option Activity (Details)

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SHARE-BASED COMPENSATION - Schedule of Stock Option Activity (Details)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
$ / shares
shares
Options (in shares):  
Outstanding at beginning of period (in shares) 10,617
Granted (in shares) 3,211
Exercised (in shares) (2,440)
Forfeited'expired (in shares) (79)
Outstanding at end of period (in shares) 11,309
Expected to vest at end of period (in shares) 5,955
Exercisable at end of period (in shares) 5,195
Weighted- Average Exercise Price (USD per share):  
Outstanding at beginning of period (USD per share) | $ / shares $ 10.64
Granted (USD per share) | $ / shares 13.77
Exercised (USD per share) | $ / shares 7.28
Forfeited or expired (USD per share) | $ / shares 14.08
Outstanding at end of period (USD per share) | $ / shares 12.23
Vested and expected to vest (USD per share) | $ / shares 13.77
Exercisable (USD per share) | $ / shares $ 10.42
Weighted-Average Remaining Contractual Life (Years)/Aggregate Intrinsic Value  
Outstanding, weighted-average remaining contractual life (years) 6 years 8 months 12 days
Expected to vest, weighted-average remaining contractual period (years) 8 years 7 months 6 days
Exercisable, weighted-average remaining contractual term (years) 4 years 6 months
Outstanding aggregate intrinsic value | $ $ 32
Expected to vest, aggregate intrinsic value | $ 8
Exercisable, aggregate intrinsic value | $ $ 24
Expected to be forfeited (in shares) 159