Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ 120	$ 351	$ 497	$ (4,350)
Other comprehensive income/(loss):
Foreign currency translation adjustments and other	9	(17)	42	(35)
Net unrealized gain/(loss) on derivative instruments, net of tax	(4)	(21)	14	(27)
Total other comprehensive income/(loss), net of tax	5	(38)	56	(62)
Total comprehensive income/(loss)	125	313	553	(4,412)
Less: Net earnings attributable to noncontrolling interests	(1)	(1)	(2)	(2)
Total comprehensive income attributable to Cardinal Health, Inc.	$ 124	$ 312	$ 551	$ (4,414)