Consolidated Statements of Comprehensive Income/(Loss) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,569	$ 853	$ 331
Other comprehensive income/(loss):
Foreign currency translation adjustments and other	(3)	(1)	(35)
Net unrealized income/(loss) on derivative instruments, net of tax	15	(15)	(2)
Total other comprehensive income/(loss), net of tax	12	(16)	(37)
Total comprehensive income	1,581	837	294
Net Income (Loss) Attributable to Noncontrolling Interest	8	1	1
Total comprehensive income attributable to Cardinal Health, Inc.	$ 1,573	$ 836	$ 293