Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 612	$ (3,693)	$ 1,365
Other comprehensive income/(loss):
Foreign currency translation adjustments and other	46	3	18
Net unrealized gain/(loss) on derivative instruments, net of tax	24	(28)	(5)
Total other comprehensive income/(loss), net of tax	70	(25)	13
Total comprehensive income/(loss)	682	(3,718)	1,378
Net Income (Loss) Attributable to Noncontrolling Interest	1	3	2
Total comprehensive income attributable to Cardinal Health, Inc.	$ 681	$ (3,721)	$ 1,376