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Net Income Per Share (Tables)
 6 Months Ended
Jul. 31, 2025
Earnings Per Share [Abstract]  
Schedule of Calculation of Numerator and Denominator in Net Loss Per Share The following table sets forth the computation of the numerators and denominators used in the basic and diluted net income per share amounts:
 Three Months Ended July 31,Six Months Ended July 31,
2025202420252024
Numerator:
Net income $313 $282 $465 $534 
Denominator:
Denominator for basic net income per share—weighted average shares213 216 214 215 
Effect of dilutive securities2 1 2 2 
Denominator for dilutive net income per share215 217 216 217 
Basic net income per share$1.47 $1.31 $2.17 $2.48 
Diluted net income per share$1.46 $1.30 $2.15 $2.46