Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ 220	$ 281	$ (4,701)	$ 874
Other comprehensive loss:
Foreign currency translation adjustments and other	(1)	(26)	(18)	(29)
Net unrealized loss on derivative instruments, net of tax	(1)	(1)	(6)	(2)
Total other comprehensive loss, net of tax	(2)	(27)	(24)	(31)
Total comprehensive income/(loss)	218	254	(4,725)	843
Less: Net earnings attributable to noncontrolling interests	0	(1)	(1)	(1)
Total comprehensive income attributable to Cardinal Health, Inc.	$ 218	$ 253	$ (4,726)	$ 842