Earnings Per Share (Tables)

6 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Reconciliation of Common Shares Used to Compute Basic and Diluted Earnings Per Share

The following tables reconcile the number of common shares used to compute basic and diluted earnings per share attributable to Cardinal Health, Inc.:

	Three Months Ended December 31
(in millions)	2015	2014
Weighted-average common shares–basic	329	331
Effect of dilutive securities:
Employee stock options, restricted share units, and performance share units	3	3
Weighted-average common shares–diluted	332	334

	Six Months Ended December 31
(in millions)	2015	2014
Weighted-average common shares–basic	329	333
Effect of dilutive securities:
Employee stock options, restricted share units, and performance share units	3	4
Weighted-average common shares–diluted	332	337