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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Statement of Comprehensive Income [Abstract]      
Net income $ 5,099 $ 3,481 $ 3,160
Other comprehensive income (loss), net of tax      
Foreign currency translation adjustments 176 (74) (7)
Unrealized gains (losses) on cash flow and other hedges 9 (7) 39
Changes in retirement-related benefit plans 2 30 (8)
Other comprehensive income (loss), net of tax 187 (51) 24
Comprehensive income 5,286 3,430 3,184
Comprehensive income attributable to noncontrolling interests (337) (186) (158)
Comprehensive income attributable to McKesson Corporation $ 4,949 $ 3,244 $ 3,026