Consolidated Statements of Earnings/(Loss) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Revenue	$ 222,578	$ 226,827	$ 204,979
Cost of products sold	214,410	219,413	198,105
Gross margin	8,168	7,414	6,874
Operating expenses:
Distribution, selling, general, and administrative expenses	5,382	5,000	4,800
Restructuring and employee severance	88	175	95
Amortization and other acquisition-related costs	464	284	285
Acquisition-related cash and share-based compensation costs [Line Items]	126	0	0
Impairments and (gain)/loss on disposal of assets, net	18	634	1,246
Litigation (recoveries)/charges, net	(185)	78	(304)
Operating earnings	2,275	1,243	752
Other (income)/expense, net	(41)	(9)	5
Interest expense, net	215	51	84
Earnings before income taxes	2,101	1,201	663
Income Tax Expense (Benefit)	532	348	332
Net earnings	1,569	853	331
Less: Net earnings attributable to noncontrolling interests	(8)	(1)	(1)
Net earnings attributable to Cardinal Health, Inc.	$ 1,561	$ 852	$ 330
Earnings per common share attributable to Cardinal Health, Inc.
Basic (in dollars per share)	$ 6.48	$ 3.48	$ 1.27
Diluted (in dollars per share)	$ 6.45	$ 3.45	$ 1.26
Weighted-average number of common shares outstanding:
Basic (in shares)	241	245	261
Diluted (in shares)	242	247	262