Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenue	$ 136,809	$ 129,976	$ 121,546
Cost of Goods and Services Sold	129,628	123,432	115,003
Gross margin	7,181	6,544	6,543
Operating expenses:
Distribution, selling, general and administrative expenses	4,596	3,775	3,648
Restructuring and employee severance	176	56	25
Amortization and other acquisition-related costs	707	527	459
Impairments and (gain)/loss on disposal of assets, net	1,417	18	21
Litigation (recoveries)/charges, net	159	48	(69)
Operating earnings	126	2,120	2,459
Other (income)/expense, net	23	(5)	5
Interest expense, net	329	201	178
Loss on extinguishment of debt	2	0	0
Earnings/(loss) before income taxes	(228)	1,924	2,276
Provision for/(benefit from) income taxes	(487)	630	845
Net earnings	259	1,294	1,431
Less: Net earnings attributable to noncontrolling interests	(3)	(6)	(4)
Net earnings attributable to Cardinal Health, Inc.	$ 256	$ 1,288	$ 1,427
Earnings per common share attributable to Cardinal Health, Inc.
Net basic earnings per common share attributable to Cardinal Health, Inc. (in usd per share)	$ 0.82	$ 4.06	$ 4.36
Diluted earnings per common share attributable to Cardinal Health, Inc.:
Net diluted earnings per common share attributable to Cardinal Health, Inc. (in usd per share)	$ 0.81	$ 4.03	$ 4.32
Weighted-average number of common shares outstanding:
Basic (in shares)	313	317	327
Diluted (in shares)	315	320	330