Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ 630	$ 220	$ 377	$ (4,701)
Other comprehensive income/(loss):
Foreign currency translation adjustments and other	21	(1)	33	(18)
Net unrealized gain/(loss) on derivative instruments, net of tax	13	(1)	18	(6)
Total other comprehensive income/(loss), net of tax	34	(2)	51	(24)
Total comprehensive income/(loss)	664	218	428	(4,725)
Less: Net earnings attributable to noncontrolling interests	(1)	0	(1)	(1)
Total comprehensive income attributable to Cardinal Health, Inc.	$ 663	$ 218	$ 427	$ (4,726)