Income Taxes	3 Months Ended
Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	8. Income Taxes Fluctuations in our provision for income taxes as a percentage of pretax earnings (“effective tax rate”) are 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 made broad and complex changes to the U.S. tax code that affected fiscal 2018 and will incrementally affect our fiscal year 2019 financial results in several ways. First, the U.S. statutory tax rate in fiscal 2019 is reduced to 21 percent. Second, the Tax Act established new tax provisions that affected 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. In fiscal 2018 we recorded provisional estimates for the remeasurement of our deferred tax assets and liabilities and the amount of the repatriation tax on undistributed foreign earnings. We did not adjust these provisional amounts during the three months ended September 30, 2018, but we did provide estimates for other provisions of the Tax Act beginning July 1, 2018. We intend to update and finalize our provisional estimates by December 2018. Effective Tax Rate During the three months ended September 30, 2018 and 2017, the effective tax rate was 19.4 percent and 34.2 percent, respectively. The reduction in the effective tax rate from fiscal 2018 to fiscal 2019 is primarily due to net benefits from the enactment of the Tax Act and the positive impact of discrete tax items, largely related to international legal entity changes. Unrecognized Tax Benefits We had $423 million of unrecognized tax benefits at September 30, 2018 and June 30, 2018. The September 30, 2018 and June 30, 2018 balances include $262 million of unrecognized tax benefits that, if recognized, would have an impact on the effective tax rate. At September 30, 2018 and June 30, 2018, we had $114 million and $110 million, respectively, accrued for the payment of interest and penalties related to unrecognized tax benefits, which we recognize in the provision for 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 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 $30 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 $153 million and $151 million at September 30, 2018 and June 30, 2018, 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. The indemnification receivable was $21 million at September 30, 2018 and June 30, 2018 and is included in other assets in the condensed consolidated balance sheet.

8. Income Taxes

Fluctuations in our provision for income taxes as a percentage of pretax earnings (“effective tax rate”) are 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 made broad and complex changes to the U.S. tax code that affected fiscal 2018 and will incrementally affect our fiscal year 2019 financial results in several ways. First, the U.S. statutory tax rate in fiscal 2019 is reduced to 21 percent. Second, the Tax Act established new tax provisions that affected 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.

In fiscal 2018 we recorded provisional estimates for the remeasurement of our deferred tax assets and liabilities and the amount of the repatriation tax on undistributed foreign earnings. We did not adjust these provisional amounts during the three months ended September 30, 2018, but we did provide estimates for other provisions of the Tax Act beginning July 1, 2018. We intend to update and finalize our provisional estimates by December 2018.

Effective Tax Rate

During the three months ended September 30, 2018 and 2017, the effective tax rate was 19.4 percent and 34.2 percent, respectively. The reduction in the effective tax rate from fiscal 2018 to fiscal 2019 is primarily due to net benefits from the enactment of the Tax Act and the positive impact of discrete tax items, largely related to international legal entity changes.

Unrecognized Tax Benefits

We had $423 million of unrecognized tax benefits at September 30, 2018 and June 30, 2018. The September 30, 2018 and June 30, 2018 balances include $262 million of unrecognized tax benefits that, if recognized, would have an impact on the effective tax rate.

At September 30, 2018 and June 30, 2018, we had $114 million and $110 million, respectively, accrued for the payment of interest and penalties related to unrecognized tax benefits, which we recognize in the provision for 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 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 $30 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 $153 million and $151 million at September 30, 2018 and June 30, 2018, 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. The indemnification receivable was $21 million at September 30, 2018 and June 30, 2018 and is included in other assets in the condensed consolidated balance sheet.