Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ (253)	$ (4,921)
Other comprehensive income/(loss):
Foreign currency translation adjustments and other	12	(17)
Net unrealized gain/(loss) on derivative instruments, net of tax	5	(5)
Total other comprehensive income/(loss), net of tax	17	(22)
Total comprehensive loss	(236)	(4,943)
Less: comprehensive income attributable to noncontrolling interests	0	(1)
Total comprehensive income attributable to Cardinal Health, Inc.	$ (236)	$ (4,944)