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Earnings Per Share Attributable to Cardinal Health, Inc. (Tables) | 3 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Reconciliation of Common Shares Used to Compute Basic and Diluted Earnings Per Share |
| Three Months Ended September 30,
(in millions) | 2018 |  | 2017
Weighted-average common shares–basic | 305 |  |  | 316 |
Effect of dilutive securities: |  |  |
Employee stock options, restricted share units, and performance share units | 1 |  |  | 2 |
Weighted-average common shares–diluted | 306 |  |  | 318 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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