Basis of Presentation and Summary of Significant Accounting Policies	3 Months Ended
Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	1. Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation Our condensed consolidated financial statements include the accounts of all majority-owned or controlled subsidiaries, and all significant intercompany transactions and amounts have been eliminated. References to "we," "our," and similar pronouns in this Quarterly Report on Form 10-Q for the quarter ended September 30, 2016 (this "Form 10-Q") refer to Cardinal Health, Inc. and its majority-owned or controlled subsidiaries unless the context requires otherwise. Our condensed consolidated financial statements have been prepared in accordance with the U.S. Securities and Exchange Commission ("SEC") instructions to Quarterly Reports on Form 10-Q and include the information and disclosures required by accounting principles generally accepted in the United States ("GAAP") for interim financial reporting. The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in the condensed consolidated financial statements and accompanying notes. Actual amounts may differ from these estimated amounts. In our opinion, all adjustments necessary for a fair presentation of the condensed consolidated financial statements have been included. Except as disclosed elsewhere in this Form 10-Q, all such adjustments are of a normal and recurring nature. In addition, financial results presented for this fiscal 2017 interim period are not necessarily indicative of the results that may be expected for the full fiscal year ending June 30, 2017. These condensed consolidated financial statements are unaudited and, accordingly, should be read in conjunction with the audited consolidated financial statements and related notes contained in our Annual Report on Form 10-K for the fiscal year ended June 30, 2016 (the "2016 Form 10-K"). Recent Financial Accounting Standards In August 2016, the Financial Accounting Standards Board (the "FASB") issued accounting guidance which clarifies the classification of certain cash receipts and cash payments in the statement of cash flows, including those related to contingent consideration payments made after a business combination, distributions received from equity method investees, debt prepayment or debt extinguishment costs, and proceeds from the settlement of insurance claims. This guidance will be effective for us in the first quarter of fiscal 2019. We are currently evaluating the impact of this standard on our consolidated financial statements. In April 2015, the FASB issued amended accounting guidance that clarifies the circumstances under which a cloud computing customer would account for the arrangement as a license of internal-use software. If it is determined that a software license does not exist in the arrangement, the customer would account for this arrangement as a service contract. We adopted this guidance in the first quarter of fiscal 2017. The adoption of this guidance did not have a material impact on our financial position or results of operations. Also in April 2015, the FASB issued amended accounting guidance related to the presentation of debt issuance costs in the financial statements. This guidance requires an entity to present such costs in the balance sheet as a direct deduction from the related debt rather than as an asset. We adopted this guidance in the first quarter of fiscal 2017. Upon adoption of this guidance, debt issuance costs of $29 million were reclassified from other assets to long-term obligations, less current portion within the condensed consolidated balance sheet. In May 2014, the FASB issued amended accounting guidance related to revenue recognition. This guidance is based on the principle that revenue is recognized in an amount that reflects the consideration to which an entity expects to be entitled in exchange for the transfer of goods or services to customers. The guidance also requires additional disclosure about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. This amendment will be effective for us in the first quarter of fiscal 2019. We are in the process of assessing any differences between the amended and existing guidance that could impact our consolidated financial statements and continuing to evaluate the options for adoption.

1. Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation

Our condensed consolidated financial statements include the accounts of all majority-owned or controlled subsidiaries, and all significant intercompany transactions and amounts have been eliminated. References to "we," "our," and similar pronouns in this Quarterly Report on Form 10-Q for the quarter ended September 30, 2016 (this "Form 10-Q") refer to Cardinal Health, Inc. and its majority-owned or controlled subsidiaries unless the context requires otherwise.

Our condensed consolidated financial statements have been prepared in accordance with the U.S. Securities and Exchange Commission ("SEC") instructions to Quarterly Reports on Form 10-Q and include the information and disclosures required by accounting principles generally accepted in the United States ("GAAP") for interim financial reporting. The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in the condensed consolidated financial statements and accompanying notes. Actual amounts may differ from these estimated amounts. In our opinion, all adjustments necessary for a fair presentation of the condensed consolidated financial statements have been included. Except as disclosed elsewhere in this Form 10-Q, all such adjustments are of a normal and recurring nature. In addition, financial results presented for this fiscal 2017 interim period are not necessarily indicative of the results that may be expected for the full fiscal year ending June 30, 2017. These condensed consolidated financial statements are unaudited and, accordingly, should be read in conjunction with the audited consolidated financial statements and related notes contained in our Annual Report on Form 10-K for the fiscal year ended June 30, 2016 (the "2016 Form 10-K").

Recent Financial Accounting Standards

In August 2016, the Financial Accounting Standards Board (the "FASB") issued accounting guidance which clarifies the classification of certain cash receipts and cash payments in the statement of cash flows, including those related to contingent consideration payments made after a business combination, distributions received from equity method investees, debt prepayment or debt extinguishment costs, and proceeds from the settlement of insurance claims. This guidance will be effective for us in the first quarter of fiscal 2019. We are currently evaluating the impact of this standard on our consolidated financial statements.

In April 2015, the FASB issued amended accounting guidance that clarifies the circumstances under which a cloud computing customer would account for the arrangement as a license of internal-use software. If it is determined that a software license does not exist in the arrangement, the customer would account for this arrangement as a service contract. We adopted this guidance in the first quarter of fiscal 2017. The adoption of this guidance did not have a material impact on our financial position or results of operations.

Also in April 2015, the FASB issued amended accounting guidance related to the presentation of debt issuance costs in the financial statements. This guidance requires an entity to present such costs in the balance sheet as a direct deduction from the related debt rather than as an asset. We adopted this guidance in the first quarter of fiscal 2017. Upon adoption of this guidance, debt issuance costs of $29 million were reclassified from other assets to long-term obligations, less current portion within the condensed consolidated balance sheet.

In May 2014, the FASB issued amended accounting guidance related to revenue recognition. This guidance is based on the principle that revenue is recognized in an amount that reflects the consideration to which an entity expects to be entitled in exchange for the transfer of goods or services to customers. The guidance also requires additional disclosure about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. This amendment will be effective for us in the first quarter of fiscal 2019. We are in the process of assessing any differences between the amended and existing guidance that could impact our consolidated financial statements and continuing to evaluate the options for adoption.