Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ (3,693)	$ 1,365	$ 259
Other comprehensive income/(loss):
Foreign currency translation adjustments and other	3	18	58
Amounts reclassified to earnings	0	0	(23)
Net unrealized gain/(loss) on derivative instruments, net of tax	(28)	(5)	(2)
Total other comprehensive income/(loss), net of tax	(25)	13	33
Total comprehensive income/(loss)	(3,718)	1,378	292
Net Income (Loss) Attributable to Noncontrolling Interest	3	2	3
Total comprehensive income attributable to Cardinal Health, Inc.	$ (3,721)	$ 1,376	$ 289