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Earnings Per Common Share
 12 Months Ended
Mar. 31, 2026
Earnings Per Share [Abstract]  
Earnings Per Common Share Earnings Per Common Share
Basic earnings per common share is computed by dividing net income by the weighted-average number of common shares outstanding during the reporting period. The computation of diluted earnings per common share is similar to that of basic earnings per common share, except that the former reflects the potential dilution that could occur if dilutive securities or other obligations to issue common stock were exercised or converted into common stock. Potentially dilutive securities include outstanding stock options, restricted stock units, and performance-based and other restricted stock units.
The computations for basic and diluted earnings or loss per common share were as follows:
Years Ended March 31,
(In millions, except per share amounts)202620252024
Numerator
Income from continuing operations$5,099 $3,481 $3,160 
Net income attributable to noncontrolling interests(215)(186)(158)
Adjustment to redemption value in net income attributable to noncontrolling interests(122)— — 
Net income attributable to McKesson Corporation$4,762 $3,295 $3,002 
Denominator
Weighted-average common shares outstanding:
Basic123.6 127.4 133.2 
Effect of dilutive securities:
Stock options— — 0.2 
Restricted stock units (1)
0.5 0.7 0.7 
Diluted124.1 128.1 134.1 
Earnings per common share attributable to McKesson Corporation: (2)
Diluted$38.38 $25.72 $22.39 
Basic$38.55 $25.86 $22.54 
(1)Includes dilutive effect from restricted stock units and performance-based restricted stock units.
(2)Certain computations may reflect rounding adjustments.