Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ 49	$ 630	$ 321	$ 377
Other comprehensive income/(loss):
Foreign currency translation adjustments and other	(18)	21	(43)	33
Net unrealized gain/(loss) on derivative instruments, net of tax	(6)	13	(8)	18
Total other comprehensive income/(loss), net of tax	(24)	34	(51)	51
Total comprehensive income	25	664	270	428
Less: Net earnings attributable to noncontrolling interests	0	(1)	(1)	(1)
Total comprehensive income attributable to Cardinal Health, Inc.	$ 25	$ 663	$ 269	$ 427