Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ 351	$ 296	$ (4,350)	$ 1,170
Other comprehensive income/(loss):
Foreign currency translation adjustments and other	(17)	13	(35)	(16)
Net unrealized loss on derivative instruments, net of tax	(21)	(1)	(27)	(3)
Total other comprehensive income/(loss), net of tax	(38)	12	(62)	(19)
Total comprehensive income/(loss)	313	308	(4,412)	1,151
Less: Net earnings attributable to noncontrolling interests	(1)	0	(2)	(1)
Total comprehensive income attributable to Cardinal Health, Inc.	$ 312	$ 308	$ (4,414)	$ 1,150