Earnings Per Share Attributable to Cardinal Health, Inc. (Tables)

3 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

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

	Three Months Ended September 30,
(in millions)	2017	2016
Weighted-average common shares–basic	316	320
Effect of dilutive securities:
Employee stock options, restricted share units, and performance share units	2	2
Weighted-average common shares–diluted	318	322