CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 703	$ 967	$ 1,700	$ 1,776
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	(64)	(192)	(12)	390
Unrealized gains on cash flow and other hedges	25	18	32	36
Changes in retirement-related benefit plans	0	2	(2)	38
Other comprehensive income (loss), net of tax	(39)	(172)	18	464
Comprehensive income	664	795	1,718	2,240
Comprehensive income attributable to noncontrolling interests	(39)	(35)	(78)	(126)
Comprehensive income attributable to McKesson Corporation	$ 625	$ 760	$ 1,640	$ 2,114