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NET INCOME (LOSS) PER SHARE
 9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
NET INCOME (LOSS) PER SHARE NET INCOME (LOSS) PER SHARE
The following table sets forth the computation of basic and diluted net income (loss) per share (in millions, except per share amounts).
Three months ended September 30,Nine months ended September 30,
 2020201920202019
NUMERATOR:    
Net income (loss)$(1,157)$659 $(2,166)$1,787 
DENOMINATOR:    
Weighted-average shares outstanding, basic 590 533 556 542 
Dilutive effect of restricted stock units— 1 — 1 
Adjusted weighted-average shares outstanding, diluted590 534 556 543 
NET INCOME (LOSS) PER SHARE:    
Basic$(1.96)$1.24 $(3.89)$3.30 
Diluted$(1.96)$1.23 $(3.89)$3.29 
Antidilutive amounts excluded from calculations:    
Convertible debt (a)5 — 2 — 
Restricted stock units1 — 1 — 
(a) See Note 8 for further information.