Commitments, Contingent Liabilities and Litigation	12 Months Ended
Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingent Liabilities and Litigation	8. Commitments, Contingent Liabilities and Litigation Commitments Operating Leases The future minimum rental payments for operating leases having initial or remaining non-cancelable lease terms in excess of one year at June 30, 2019 for fiscal 2020 through 2024 and thereafter are as follows: $126 million, $100 million, $76 million, $54 million, $33 million and $94 million. Rental expense relating to operating leases was $153 million, $172 million and $159 million in fiscal 2019, 2018 and 2017, respectively. Sublease rental income was immaterial for all periods presented. Generic Sourcing Venture with CVS Health Corporation ("CVS Health") Red Oak Sourcing, LLC ("Red Oak Sourcing") is a U.S.-based generic pharmaceutical sourcing venture with CVS Health for an initial term through June 2024. Red Oak Sourcing negotiates generic pharmaceutical supply contracts on behalf of its participants. Due to the achievement of predetermined milestones, we are required to make quarterly payments of $45.6 million to CVS Health for the initial term. Contingencies New York Opioid Stewardship Act In April 2018, the State of New York passed a budget which included the Opioid Stewardship Act (the "OSA"). The OSA created an aggregate $100 million annual assessment on all manufacturers and distributors licensed to sell or distribute opioids in New York. Under the OSA, each licensed manufacturer and distributor would be required to pay a portion of the assessment based on its ratable share, as determined by the state, of the total morphine milligram equivalents sold or distributed in New York during the applicable calendar year, beginning in 2017. In October 2018, we received notices from the New York Department of Health of our estimated payment amount for calendar year 2017. In December 2018, the U.S. District Court for the Southern District of New York ruled that the OSA is unconstitutional and enjoined its enforcement (the "Ruling"). In January 2019, the State filed notice of its intent to appeal the Ruling. In April 2019, the State, among other things, amended the OSA so that the assessment would only cover opioid sales in 2017 and 2018, subject to the State's pending appeal of the Ruling. We accrue contingencies if it is probable that a liability has been incurred and the amount can be estimated. At June 30, 2019, we have no amounts accrued for the OSA because we do not believe it is probable that a liability has been incurred. Legal Proceedings We become involved from time to time in disputes, litigation and regulatory matters. We may be named from time to time in qui tam actions initiated by private third parties. In such actions, the private parties purport to act on behalf of federal or state governments, allege that false claims have been submitted for payment by the government and may receive an award if their claims are successful. After a private party has filed a qui tam action, the government must investigate the private party's claim and determine whether to intervene in and take control over the litigation. These actions may remain under seal while the government makes this determination. If the government declines to intervene, the private party may nonetheless continue to pursue the litigation on his or her own purporting to act on behalf of the government. From time to time, we become aware through employees, internal audits or other parties of possible compliance matters, such as complaints or concerns relating to accounting, internal accounting controls, financial reporting, auditing, or other ethical matters or relating to compliance with laws such as healthcare fraud and abuse, anti-corruption or anti-bribery laws. When we become aware of such possible compliance matters, we investigate internally and take appropriate corrective action. In addition, from time to time, we receive subpoenas or requests for information from various federal or state agencies relating to our business or to the business of a customer, supplier or other industry participants. Internal investigations, subpoenas or requests for information could lead to the assertion of claims or the commencement of legal proceedings against us or result in sanctions. From time to time, we determine that products we manufacture or market do not meet our specifications, regulatory requirements, or published standards. When we or a regulatory agency identify a potential quality or regulatory issue, we investigate and take appropriate corrective action. Such actions can lead to product recalls, costs to repair or replace affected products, temporary interruptions in product sales, action by regulators and product liability claims and lawsuits, including class actions. Even absent an identified regulatory or quality issue or product recall, we can become subject to product liability claims and lawsuits. We accrue for contingencies related to disputes, litigation and regulatory matters if it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Because these matters are inherently unpredictable and unfavorable developments or resolutions can occur, assessing contingencies is highly subjective and requires judgments about future events. We regularly review contingencies to determine whether our accruals and related disclosures are adequate. The amount of ultimate loss may differ from these estimates. We recognize income from the favorable outcome of litigation when we receive the associated cash or assets. We recognize estimated loss contingencies for certain litigation and regulatory matters and income from favorable resolution of litigation in litigation (recoveries)/charges in our consolidated statements of earnings. Opioid Lawsuits Pharmaceutical wholesale distributors, including us, have been named as defendants in approximately 2,500 lawsuits relating to the distribution of prescription opioid pain medications. These lawsuits have been filed in various federal, state, and other courts by a variety of plaintiffs, primarily counties, municipalities and political subdivisions. Plaintiffs also include unions and other health and welfare funds, hospital systems and other healthcare providers, as well as individuals. Of these lawsuits, 95 are purported class actions. The lawsuits seek equitable relief and monetary damages based on a variety of legal theories including various common law claims, such as negligence, public nuisance and unjust enrichment as well as violations of controlled substance laws, the Racketeer Influenced and Corrupt Organizations Act and various other statutes. These lawsuits also name pharmaceutical manufacturers, retail pharmacy chains and other entities as defendants. The vast majority of these lawsuits were filed in U.S. federal court and have been transferred for consolidated pre-trial proceedings in a Multi-District Litigation proceeding in the U.S. District Court for the Northern District of Ohio. The court, among other things, has ordered that a bellwether trial involving two county plaintiffs begin in October 2019. Motions for summary judgment have been filed by plaintiffs and defendants. In addition, 18 state attorneys general have filed lawsuits against distributors, including us, in various state courts. Several of these lawsuits, including lawsuits filed by the New York, Ohio and Washington Attorneys General, as well as other cases pending in state court, are currently scheduled to go to trial in the second half of fiscal year 2020 or early fiscal 2021. In addition to the 18 state attorneys general that have filed suit, 43 state attorneys general have formed a multi-state task force to investigate the manufacturing, distribution, dispensing and prescribing practices of opioid medications. We have received requests related to the multi-state investigation, as well as separate civil investigative demands, subpoenas or requests for information from these and other state attorneys general offices. We are cooperating with the offices conducting these investigations. In connection with these proceedings, distributors continue to discuss possible resolution with various parties, including state attorneys general and representatives of the MDL plaintiffs. We are vigorously defending ourselves in all of these opioid-related matters. Given the uncertainty surrounding these lawsuits and investigations, we are unable to predict their outcome or estimate a range of reasonably possible losses, but the defense and resolution of these lawsuits could have a material adverse effect on our results of operations, financial condition, cash flows and liquidity or have adverse reputational or operational effects on our business. Product Liability Lawsuits As of August 13, 2019, we are named as a defendant in 261 product liability lawsuits coordinated in Alameda County Superior Court in California involving claims by approximately 3,160 plaintiffs that allege personal injuries associated with the use of Cordis OptEase and TrapEase inferior vena cava (IVC) filter products. Another 22 lawsuits involving similar claims by approximately 26 plaintiffs are pending in other jurisdictions. These lawsuits seek a variety of remedies, including unspecified monetary damages. We are vigorously defending ourselves in these lawsuits. At June 30, 2019, we had a total of $368 million, net of estimated insurance recoveries, accrued for losses and legal defense costs related to the Cordis IVC filter lawsuits which are presented on a gross basis in the consolidated balance sheets. We believe there is a range of estimated losses with respect to these matters. Because no amount within the range is a better estimate than any other amount within the range, we have accrued the minimum amount in the range. We estimate the high end of the range to be approximately $762 million, net of estimated insurance recoveries. Shareholder Securities Litigation In August 2019, the Louisiana Sheriffs' Pension & Relief Fund filed a purported class action complaint against Cardinal Health and certain current and former officers and employees in the United States District Court for the Southern District of Ohio purportedly on behalf of all purchasers of our common shares between March 2015 and May 2018. The complaint alleges that the defendants violated Sections 10(b) and 20(a) of the Securities and Exchange Act of 1934 by making misrepresentations and omissions related to the integration of the Cordis business and inventory and supply chain problems within the Cordis business, and seeks to recover unspecified damages and equitable relief for the alleged misstatements and omissions. We believe that the claims asserted in this complaint are without merit and intend to vigorously defend against them. Due to the early stage of this proceeding, it is not possible to reasonably estimate the amount of any possible loss or range of loss in this matter. Antitrust Litigation Proceeds We received and recognized income resulting from settlements of lawsuits in which we were a class member or plaintiff of $94 million and $22 million during fiscal 2019 and 2018, respectively.

8. Commitments, Contingent Liabilities and Litigation

Commitments

Operating Leases

The future minimum rental payments for operating leases having initial or remaining non-cancelable lease terms in excess of one year at June 30, 2019 for fiscal 2020 through 2024 and thereafter are as follows: $126 million, $100 million, $76 million, $54 million, $33 million and $94 million. Rental expense relating to operating leases was $153 million, $172 million and $159 million in fiscal 2019, 2018 and 2017, respectively. Sublease rental income was immaterial for all periods presented.

Generic Sourcing Venture with CVS Health Corporation ("CVS Health")

Red Oak Sourcing, LLC ("Red Oak Sourcing") is a U.S.-based generic pharmaceutical sourcing venture with CVS Health for an initial term through June 2024. Red Oak Sourcing negotiates generic pharmaceutical supply contracts on behalf of its participants. Due to the achievement of predetermined milestones, we are required to make quarterly payments of $45.6 million to CVS Health for the initial term.

Contingencies

New York Opioid Stewardship Act

In April 2018, the State of New York passed a budget which included the Opioid Stewardship Act (the "OSA"). The OSA created an aggregate $100 million annual assessment on all manufacturers and distributors licensed to sell or distribute opioids in New York. Under the OSA, each licensed manufacturer and distributor would be required to pay a portion of the assessment based on its ratable share, as determined by the state, of the total morphine milligram equivalents sold or distributed in New York during the applicable calendar year, beginning in 2017.

In October 2018, we received notices from the New York Department of Health of our estimated payment amount for calendar year 2017. In December 2018, the U.S. District Court for the Southern District of New York ruled that the OSA is unconstitutional and enjoined its enforcement (the "Ruling"). In January 2019, the State filed notice of its intent to appeal the Ruling. In April 2019, the State, among other things, amended the OSA so that the assessment would only cover opioid sales in 2017 and 2018, subject to the State's pending appeal of the Ruling.

We accrue contingencies if it is probable that a liability has been incurred and the amount can be estimated. At June 30, 2019, we have no amounts accrued for the OSA because we do not believe it is probable that a liability has been incurred.

Legal Proceedings

We become involved from time to time in disputes, litigation and regulatory matters.

We may be named from time to time in qui tam actions initiated by private third parties. In such actions, the private parties purport to act on behalf of federal or state governments, allege that false claims have been submitted for payment by the government and may receive an award if their claims are successful. After a private party has filed a qui tam action, the government must investigate the private party's claim and determine whether to intervene in and take control over the litigation. These actions may remain under seal while the government makes this determination. If the government declines to intervene, the private party may nonetheless continue to pursue the litigation on his or her own purporting to act on behalf of the government.

From time to time, we become aware through employees, internal audits or other parties of possible compliance matters, such as complaints or concerns relating to accounting, internal accounting controls, financial reporting, auditing, or other ethical matters or relating to compliance with laws such as healthcare fraud and abuse, anti-corruption or anti-bribery laws. When we become aware of such possible compliance matters, we investigate internally and take appropriate corrective action. In addition, from time to time, we receive subpoenas or requests for information from various federal or state agencies relating to our business or to the business of a customer, supplier or other industry participants. Internal investigations, subpoenas or requests for information could lead to the assertion of claims or the commencement of legal proceedings against us or result in sanctions.

From time to time, we determine that products we manufacture or market do not meet our specifications, regulatory requirements, or published standards. When we or a regulatory agency identify a potential quality or regulatory issue, we investigate and take appropriate corrective action. Such actions can lead to product recalls, costs to repair or replace affected products, temporary interruptions in product sales, action by regulators and product liability claims and lawsuits, including class actions. Even absent an identified regulatory or quality issue or product recall, we can become subject to product liability claims and lawsuits.

We accrue for contingencies related to disputes, litigation and regulatory matters if it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Because these matters are inherently unpredictable and unfavorable developments or resolutions can occur, assessing contingencies is highly subjective and requires judgments about future events. We regularly review contingencies to determine whether our accruals and related disclosures are adequate. The amount of ultimate loss may differ from these estimates.

We recognize income from the favorable outcome of litigation when we receive the associated cash or assets.

We recognize estimated loss contingencies for certain litigation and regulatory matters and income from favorable resolution of litigation in litigation (recoveries)/charges in our consolidated statements of earnings.

Opioid Lawsuits

Pharmaceutical wholesale distributors, including us, have been named as defendants in approximately 2,500 lawsuits relating to the distribution of prescription opioid pain medications. These lawsuits have been filed in various federal, state, and other courts by a variety of plaintiffs, primarily counties, municipalities and political subdivisions. Plaintiffs also include unions and other health and welfare funds, hospital systems and other healthcare providers, as well as individuals. Of these lawsuits, 95 are purported class actions. The lawsuits seek equitable relief and monetary damages based on a variety of legal theories including various common law claims, such as negligence, public nuisance and unjust enrichment as well as violations of controlled substance laws, the Racketeer Influenced and Corrupt Organizations Act and various other statutes. These lawsuits also name pharmaceutical manufacturers, retail pharmacy chains and other entities as defendants.

The vast majority of these lawsuits were filed in U.S. federal court and have been transferred for consolidated pre-trial proceedings in a Multi-District Litigation proceeding in the U.S. District Court for the Northern District of Ohio. The court, among other things, has ordered that a bellwether trial involving two county plaintiffs begin in October 2019. Motions for summary judgment have been filed by plaintiffs and defendants.

In addition, 18 state attorneys general have filed lawsuits against distributors, including us, in various state courts. Several of these lawsuits, including lawsuits filed by the New York, Ohio and Washington Attorneys General, as well as other cases pending in state court, are currently scheduled to go to trial in the second half of fiscal year 2020 or early fiscal 2021.

In addition to the 18 state attorneys general that have filed suit, 43 state attorneys general have formed a multi-state task force to investigate the manufacturing, distribution, dispensing and prescribing practices of opioid medications. We have received requests related to the multi-state investigation, as well as separate civil investigative demands, subpoenas or requests for information from these and other state attorneys general offices. We are cooperating with the offices conducting these investigations.

In connection with these proceedings, distributors continue to discuss possible resolution with various parties, including state attorneys general and representatives of the MDL plaintiffs.

We are vigorously defending ourselves in all of these opioid-related matters. Given the uncertainty surrounding these lawsuits and investigations, we are unable to predict their outcome or estimate a range of reasonably possible losses, but the defense and resolution of these lawsuits could have a material adverse effect on our results of operations, financial condition, cash flows and liquidity or have adverse reputational or operational effects on our business.

Product Liability Lawsuits

As of August 13, 2019, we are named as a defendant in 261 product liability lawsuits coordinated in Alameda County Superior Court in California involving claims by approximately 3,160 plaintiffs that allege personal injuries associated with the use of Cordis OptEase and TrapEase inferior vena cava (IVC) filter products. Another 22 lawsuits involving similar claims by approximately 26 plaintiffs are pending in other jurisdictions. These lawsuits seek a variety of remedies, including unspecified monetary damages. We are vigorously defending ourselves in these lawsuits.

At June 30, 2019, we had a total of $368 million, net of estimated insurance recoveries, accrued for losses and legal defense costs related to the Cordis IVC filter lawsuits which are presented on a gross basis in the consolidated balance sheets. We believe there is a range of estimated losses with respect to these matters. Because no amount within the range is a better estimate than any other amount within the range, we have accrued the minimum amount in the range. We estimate the high end of the range to be approximately $762 million, net of estimated insurance recoveries.

Shareholder Securities Litigation

In August 2019, the Louisiana Sheriffs' Pension & Relief Fund filed a purported class action complaint against Cardinal Health and certain current and former officers and employees in the United States District Court for the Southern District of Ohio purportedly on behalf of all purchasers of our common shares between March 2015 and May 2018. The complaint alleges that the defendants violated Sections 10(b) and 20(a) of the Securities and Exchange Act of 1934 by making misrepresentations and omissions related to the integration of the Cordis business and inventory and supply chain problems within the Cordis business, and seeks to recover unspecified damages and equitable relief for the alleged misstatements and omissions. We believe that the claims asserted in this complaint are without merit and intend to vigorously defend against them. Due to the early stage of this proceeding, it is not possible to reasonably estimate the amount of any possible loss or range of loss in this matter.

Antitrust Litigation Proceeds

We received and recognized income resulting from settlements of lawsuits in which we were a class member or plaintiff of $94 million and $22 million during fiscal 2019 and 2018, respectively.