Earnings Per Share Attributable to Cardinal Health, Inc. (Reconciliation of Common Shares Used to Compute Basic and Diluted EPS) (Details) - shares shares in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2020 |
Mar. 31, 2019 |
|
Earnings Per Share [Abstract] | ||||
Weighted-average common shares–basic (in shares) | 292 | 298 | 293 | 301 |
Effect of dilutive securities: | ||||
Employee stock options, restricted share units, and performance share units (in shares) | 2 | 1 | 0 | 1 |
Weighted-average common shares–diluted (in shares) | 294 | 299 | 293 | 302 |