Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,365	$ 259	$ 1,294
Other comprehensive income/(loss):
Foreign currency translation adjustments and other	18	58	(25)
Amounts reclassified to earnings	0	(23)	0
Net unrealized gain/(loss) on derivative instruments, net of tax	(5)	(2)	16
Total other comprehensive income/(loss), net of tax	13	33	(9)
Total comprehensive income	1,378	292	1,285
Net Income (Loss) Attributable to Noncontrolling Interest	2	3	6
Total comprehensive income attributable to Cardinal Health, Inc.	$ 1,376	$ 289	$ 1,279