Income Taxes	9 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	8. Income Taxes Fluctuations in our provision for/(benefit from) income taxes as a percentage of pretax earnings (“effective tax rate”) are generally due to changes in international and U.S. state effective tax rates resulting from our business mix and discrete items. U.S. Tax Cuts and Jobs Act On December 22, 2017, the United States enacted the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act makes broad and complex changes to the U.S. tax code that affect our fiscal year 2018 financial results in two primary ways. First, effective as of January 1, 2018, the Tax Act reduces the U.S. federal corporate tax rate from 35 percent to 21 percent. Second, it requires companies to pay a one-time U.S. repatriation tax on certain undistributed earnings of foreign subsidiaries. Because our fiscal year ends in June, we have a blended U.S. Federal statutory tax rate for fiscal 2018 of 28.1 percent under the Tax Act. The Tax Act also establishes new tax provisions that will affect us beginning July 1, 2018 including, (1) eliminating the U.S. manufacturing deduction; (2) establishing new limitations on deductible interest expense and certain executive compensation; (3) eliminating the corporate alternative minimum tax; (4) creating the base erosion anti-abuse tax; (5) creating a new provision designed to tax global intangible low-tax income (“GILTI”); (6) generally eliminating U.S. federal income taxes on dividends from foreign subsidiaries; and (7) changing rules related to uses and limitations of net operating loss carryforwards created in tax years beginning after December 31, 2017. Regarding the new GILTI tax rules, we are allowed to make an accounting policy election to either (1) treat taxes due on future GILTI exclusions in U.S. taxable income as a current period expense when incurred or (2) reflect such portion of the future GILTI exclusions in U.S. taxable income that relate to existing basis differences in our measurement of deferred taxes. Our analysis of the new GILTI rules and how they may impact us is incomplete. Accordingly, we have not made a policy election regarding the treatment of the GILTI tax. Remeasurement of Deferred Tax Assets and Liabilities As a result of the enactment of a lower tax rate, we remeasured our U.S. deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future. While we are still analyzing certain aspects of the Tax Act and refining our calculations, we have recorded a measurement period adjustment to our provisional net benefit of $18 million in the three months ended March 31, 2018, for a total provisional net benefit of $952 million in the nine months ended March 31, 2018, related to this required remeasurement. The provisional estimate is based on currently available information related to deferred tax assets and liabilities which is subject to change as additional information becomes available, prepared, and analyzed. Repatriation Tax on Undistributed Foreign Earnings In connection with the required one-time U.S. repatriation tax on undistributed earnings of foreign subsidiaries, we recorded no additional adjustment during the three months ended March 31, 2018 to the provisional tax expense of $41 million for the nine months ended March 31, 2018. The Tax Act permits the payment of this tax over an eight-year period beginning in fiscal 2019. Though these foreign earnings have been deemed to be repatriated from a U.S. federal tax perspective, we have not yet completed our assessment of the Tax Act on our plans to reinvest foreign earnings and as such have not changed our prior conclusion that the earnings are indefinitely reinvested. The repatriation tax is based on currently available information and technical guidance related to the new tax law. The provisional estimate will be updated when additional information related to undistributed foreign earnings, foreign taxes and foreign cash and equivalents becomes available, prepared and analyzed. Effective Tax Rate During the three months ended March 31, 2018 and 2017, the effective tax rate was 45.1 percent and 32.3 percent, respectively. The effective tax rate for the three months ended March 31, 2018 was negatively impacted by a reduction in projected Cordis income and its impact on jurisdictional mix encompassing U.S. and international operations, as well as net unfavorable discrete items of $18 million, partially offset by the favorable impact of the lower U.S. federal income tax rate from enactment of the Tax Act. The effective tax rate for the three months ended March 31, 2017 was impacted by net favorable discrete items of $31 million. During the nine months ended March 31, 2018 and 2017, the effective tax rate was (48.6) percent and 34.4 percent, respectively. The effective tax rate for the nine months ended March 31, 2018 was favorably impacted by the provisional net benefit from enactment of the Tax Act. The provisional net benefit from the Tax Act during the three and nine months ended March 31, 2018 includes the aforementioned remeasurement of our deferred tax assets and liabilities to the new federal statutory rate provisional measurement period adjustment of $18 million and net tax benefit of $952 million, respectively, the benefit from the impact of applying a lower federal tax rate to year-to-date U.S. pre-tax earnings and $41 million provisional tax expense for the one-time repatriation tax applied to our undistributed foreign earnings. Our effective tax rate for the nine months ended March 31, 2018 also includes $57 million of tax expense recognized during the three months ended December 31, 2017 in connection with the sale of our China distribution business. Unrecognized Tax Benefits At March 31, 2018 and June 30, 2017, we had $426 million and $417 million of unrecognized tax benefits, respectively. The March 31, 2018 and June 30, 2017 balances include $264 million and $268 million of unrecognized tax benefits, respectively, that if recognized, would have an impact on the effective tax rate. At March 31, 2018 and June 30, 2017, we had $106 million and $99 million, respectively, accrued for the payment of interest and penalties related to unrecognized tax benefits, which we recognize in the provision for/(benefit from) income taxes in the condensed consolidated statements of earnings. These balances are gross amounts before any tax benefits and are included in deferred income taxes and other liabilities in the condensed consolidated balance sheets. It is reasonably possible that there could be a change in the amount of unrecognized tax benefits within the next 12 months due to activities of the U.S. Internal Revenue Service ("IRS") or other taxing authorities, possible settlement of audit issues, reassessment of existing unrecognized tax benefits or the expiration of statutes of limitations. We estimate that the range of the possible change in unrecognized tax benefits within the next 12 months is between zero and a net decrease of $35 million, exclusive of penalties and interest. Other Tax Matters We file income tax returns in the U.S. federal jurisdiction, various U.S. state jurisdictions and various foreign jurisdictions. With few exceptions, we are subject to audit by taxing authorities for fiscal years 2008 through the current fiscal year. We are a party to a tax matters agreement with CareFusion Corporation ("CareFusion"), which has been acquired by Becton, Dickinson and Company. Under the tax matters agreement, CareFusion is obligated to indemnify us for certain tax exposures and transaction taxes prior to our fiscal 2010 spin-off of CareFusion. The indemnification receivable was $148 million and $142 million at March 31, 2018 and June 30, 2017, respectively, and is included in other assets in the condensed consolidated balance sheets. As a result of the acquisition of the Patient Recovery Business, Medtronic plc is obligated to indemnify us for certain tax exposures and transaction taxes related to periods prior to the acquisition under the purchase agreement. The indemnification receivable was $34 million at March 31, 2018.

8. Income Taxes

Fluctuations in our provision for/(benefit from) income taxes as a percentage of pretax earnings (“effective tax rate”) are generally due to changes in international and U.S. state effective tax rates resulting from our business mix and discrete items.

U.S. Tax Cuts and Jobs Act

On December 22, 2017, the United States enacted the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act makes broad and complex changes to the U.S. tax code that affect our fiscal year 2018 financial results in two primary ways. First, effective as of January 1, 2018, the Tax Act reduces the U.S. federal corporate tax rate from 35 percent to 21 percent. Second, it requires companies to pay a one-time U.S. repatriation tax on certain undistributed earnings of foreign subsidiaries. Because our fiscal year ends in June, we have a blended U.S. Federal statutory tax rate for fiscal 2018 of 28.1 percent under the Tax Act. The Tax Act also establishes new tax provisions that will affect us beginning July 1, 2018 including, (1) eliminating the U.S. manufacturing deduction; (2) establishing new limitations on deductible interest expense and certain executive compensation; (3) eliminating the corporate alternative minimum tax; (4) creating the base erosion anti-abuse tax; (5) creating a new provision designed to tax global intangible low-tax income (“GILTI”); (6) generally eliminating U.S. federal income taxes on dividends from foreign subsidiaries; and (7) changing rules related to uses and limitations of net operating loss carryforwards created in tax years beginning after December 31, 2017.

Regarding the new GILTI tax rules, we are allowed to make an accounting policy election to either (1) treat taxes due on future GILTI exclusions in U.S. taxable income as a current period expense when incurred or (2) reflect such portion of the future GILTI exclusions in U.S. taxable income that relate to existing basis differences in our measurement of deferred taxes. Our analysis of the new GILTI rules and how they may impact us is incomplete. Accordingly, we have not made a policy election regarding the treatment of the GILTI tax.

Remeasurement of Deferred Tax Assets and Liabilities

As a result of the enactment of a lower tax rate, we remeasured our U.S. deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future. While we are still analyzing certain aspects of the Tax Act and refining our calculations, we have recorded a measurement period adjustment to our provisional net benefit of $18 million in the three months ended March 31, 2018, for a total provisional net benefit of $952 million in the nine months ended March 31, 2018, related to this required remeasurement. The provisional estimate is based on currently available information related to deferred tax assets and liabilities which is subject to change as additional information becomes available, prepared, and analyzed.

Repatriation Tax on Undistributed Foreign Earnings

In connection with the required one-time U.S. repatriation tax on undistributed earnings of foreign subsidiaries, we recorded no additional adjustment during the three months ended March 31, 2018 to the provisional tax expense of $41 million for the nine months ended March 31, 2018. The Tax Act permits the payment of this tax over an eight-year period beginning in fiscal 2019. Though these foreign earnings have been deemed to be repatriated from a U.S. federal tax perspective, we have not yet completed our assessment of the Tax Act on our plans to reinvest foreign earnings and as such have not changed our prior conclusion that the earnings are indefinitely reinvested. The repatriation tax is based on currently available information and technical guidance related to the new tax law. The provisional estimate will be updated when additional information related to undistributed foreign earnings, foreign taxes and foreign cash and equivalents becomes available, prepared and analyzed.

Effective Tax Rate

During the three months ended March 31, 2018 and 2017, the effective tax rate was 45.1 percent and 32.3 percent, respectively. The effective tax rate for the three months ended March 31, 2018 was negatively impacted by a reduction in projected Cordis income and its impact on jurisdictional mix encompassing U.S. and international operations, as well as net unfavorable discrete items of $18 million, partially offset by the favorable impact of the lower U.S. federal income tax rate from enactment of the Tax Act. The effective tax rate for the three months ended March 31, 2017 was impacted by net favorable discrete items of $31 million.

During the nine months ended March 31, 2018 and 2017, the effective tax rate was (48.6) percent and 34.4 percent, respectively. The effective tax rate for the nine months ended March 31, 2018 was favorably impacted by the provisional net benefit from enactment of the Tax Act.

The provisional net benefit from the Tax Act during the three and nine months ended March 31, 2018 includes the aforementioned remeasurement of our deferred tax assets and liabilities to the new federal statutory rate provisional measurement period adjustment of $18 million and net tax benefit of $952 million, respectively, the benefit from the impact of applying a lower federal tax rate to year-to-date U.S. pre-tax earnings and $41 million provisional tax expense for the one-time repatriation tax applied to our undistributed foreign earnings.

Our effective tax rate for the nine months ended March 31, 2018 also includes $57 million of tax expense recognized during the three months ended December 31, 2017 in connection with the sale of our China distribution business.

Unrecognized Tax Benefits

At March 31, 2018 and June 30, 2017, we had $426 million and $417 million of unrecognized tax benefits, respectively. The March 31, 2018 and June 30, 2017 balances include $264 million and $268 million of unrecognized tax benefits, respectively, that if recognized, would have an impact on the effective tax rate.

At March 31, 2018 and June 30, 2017, we had $106 million and $99 million, respectively, accrued for the payment of interest and penalties related to unrecognized tax benefits, which we recognize in the provision for/(benefit from) income taxes in the condensed consolidated statements of earnings. These balances are gross amounts before any tax benefits and are included in deferred income taxes and other liabilities in the condensed consolidated balance sheets.

It is reasonably possible that there could be a change in the amount of unrecognized tax benefits within the next 12 months due to activities of the U.S. Internal Revenue Service ("IRS") or other taxing authorities, possible settlement of audit issues, reassessment of existing unrecognized tax benefits or the expiration of statutes of limitations. We estimate that the range of the possible change in unrecognized tax benefits within the next 12 months is between zero and a net decrease of $35 million, exclusive of penalties and interest.

Other Tax Matters

We file income tax returns in the U.S. federal jurisdiction, various U.S. state jurisdictions and various foreign jurisdictions. With few exceptions, we are subject to audit by taxing authorities for fiscal years 2008 through the current fiscal year.

We are a party to a tax matters agreement with CareFusion Corporation ("CareFusion"), which has been acquired by Becton, Dickinson and Company. Under the tax matters agreement, CareFusion is obligated to indemnify us for certain tax exposures and transaction taxes prior to our fiscal 2010 spin-off of CareFusion. The indemnification receivable was $148 million and $142 million at March 31, 2018 and June 30, 2017, respectively, and is included in other assets in the condensed consolidated balance sheets.

As a result of the acquisition of the Patient Recovery Business, Medtronic plc is obligated to indemnify us for certain tax exposures and transaction taxes related to periods prior to the acquisition under the purchase agreement. The indemnification receivable was $34 million at March 31, 2018.