XML 12 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Cover - shares
 9 Months Ended
Dec. 31, 2024
Jan. 31, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Dec. 31, 2024  
Document Transition Report false  
Entity File Number 1-13252  
Entity Registrant Name McKESSON CORPORATION  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 94-3207296  
Entity Address, Address Line One 6555 State Hwy 161  
Entity Address, City or Town Irving  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 75039  
City Area Code 972  
Local Phone Number 446-4800  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   125,326,376
Entity Central Index Key 0000927653  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Current Fiscal Year End Date --03-31  
Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Common stock, $0.01 par value  
Trading Symbol MCK  
Security Exchange Name NYSE  
1.500% Notes due 2025    
Document Information [Line Items]    
Title of 12(b) Security 1.500% Notes due 2025  
Trading Symbol MCK25  
Security Exchange Name NYSE  
1.625% Notes due 2026    
Document Information [Line Items]    
Title of 12(b) Security 1.625% Notes due 2026  
Trading Symbol MCK26  
Security Exchange Name NYSE  
3.125% Notes due 2029    
Document Information [Line Items]    
Title of 12(b) Security 3.125% Notes due 2029  
Trading Symbol MCK29  
Security Exchange Name NYSE