Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ 380	$ 508	$ 1,305	$ 1,326
Other comprehensive income/(loss):
Foreign currency translation adjustments and other	(2)	(2)	3	(13)
Net unrealized gain/(loss) on derivative instruments, net of tax	(6)	6	(9)	4
Total other comprehensive income/(loss), net of tax	(8)	4	(6)	(9)
Total comprehensive income	372	512	1,299	1,317
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(19)	2	(11)	4
Total comprehensive income attributable to Cardinal Health, Inc.	$ 391	$ 510	$ 1,310	$ 1,313