Income taxes	6 Months Ended
Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income taxes	Income taxes On December 22, 2017, the U.S. Tax Cuts and Jobs Act ("the TCJ Act") was enacted into law. The TCJ Act significantly reforms the Internal Revenue Code of 1986, as amended, by among other things, establishing a flat corporate income tax rate of 21 percent and creating a territorial tax system (with a one-time transition tax imposed on previously unremitted foreign earnings and profits). The reduction in the U.S. corporate tax rate under the TCJ Act required a one-time revaluation of certain tax-related assets and liabilities to reflect their value at the reduced corporate tax rate of 21 percent which resulted in a decrease in income tax expense for the three months ended December 31, 2017 of approximately $62 million. The one-time transition tax on previously unremitted foreign earnings and profits resulted in an increase in income tax expense for the three months ended December 31, 2017 of $287 million. The Company intends to make the election to pay the one-time transition tax over eight years. The amounts recorded for both the revaluation of certain tax-related assets and liabilities and the one-time transition tax on previously unremitted foreign earnings and profits have been recorded as reasonable estimates based on the Company's analysis performed to date and will be revised, as necessary, once the estimates used in the Company's analysis have been finalized. 12. Income taxes, cont'd The TCJ Act also establishes new tax laws that will affect future tax years, including, but not limited to, the creation of the base erosion anti-abuse tax, a general limitation of U.S. federal income taxes on dividends from foreign subsidiaries, and a new provision designed to tax global intangible low-taxed income. The Company continues to evaluate the future impacts of these provisions and has not recorded any impact of the TCJ Act aside from those previously mentioned. The Company and its subsidiaries file income tax returns in the United States and in various foreign jurisdictions. In the normal course of business, the Company is subject to examination by taxing authorities throughout the world. The Company is open to assessment of its federal income tax returns by the U.S. Internal Revenue Service for fiscal years after 2011, and its state and local returns for fiscal years after 2011. The Company is also open to assessment for foreign jurisdictions for fiscal years after 2007. Unrecognized tax benefits reflect the difference between positions taken or expected to be taken on income tax returns and the amounts reflected in the financial statements. As of December 31, 2017, the Company had gross unrecognized tax benefits of $152,705. The total amount of gross unrecognized tax benefits that, if recognized, would affect the effective tax rate was $100,163. If recognized, a significant portion of the gross unrecognized tax benefits would be offset against an asset currently recorded in the Consolidated Balance Sheet. The accrued interest related to the gross unrecognized tax benefits, excluded from the amounts above, is $17,864. It is reasonably possible that within the next 12 months the amount of gross unrecognized tax benefits could be reduced by up to approximately $110,000 as a result of the revaluation of existing uncertain tax positions arising from developments in the examination process or the closure of tax statutes. Any increase in the amount of gross unrecognized tax benefits within the next 12 months is expected to be insignificant.

Income taxes

On December 22, 2017, the U.S. Tax Cuts and Jobs Act ("the TCJ Act") was enacted into law. The TCJ Act significantly reforms the Internal Revenue Code of 1986, as amended, by among other things, establishing a flat corporate income tax rate of 21 percent and creating a territorial tax system (with a one-time transition tax imposed on previously unremitted foreign earnings and profits).

The reduction in the U.S. corporate tax rate under the TCJ Act required a one-time revaluation of certain tax-related assets and liabilities to reflect their value at the reduced corporate tax rate of 21 percent which resulted in a decrease in income tax expense for the three months ended December 31, 2017 of approximately $62 million. The one-time transition tax on previously unremitted foreign earnings and profits resulted in an increase in income tax expense for the three months ended December 31, 2017 of $287 million. The Company intends to make the election to pay the one-time transition tax over eight years. The amounts recorded for both the revaluation of certain tax-related assets and liabilities and the one-time transition tax on previously unremitted foreign earnings and profits have been recorded as reasonable estimates based on the Company's analysis performed to date and will be revised, as necessary, once the estimates used in the Company's analysis have been finalized.

12. Income taxes, cont'd

The TCJ Act also establishes new tax laws that will affect future tax years, including, but not limited to, the creation of the base erosion anti-abuse tax, a general limitation of U.S. federal income taxes on dividends from foreign subsidiaries, and a new provision designed to tax global intangible low-taxed income. The Company continues to evaluate the future impacts of these provisions and has not recorded any impact of the TCJ Act aside from those previously mentioned.

The Company and its subsidiaries file income tax returns in the United States and in various foreign jurisdictions. In the normal course of business, the Company is subject to examination by taxing authorities throughout the world. The Company is open to assessment of its federal income tax returns by the U.S. Internal Revenue Service for fiscal years after 2011, and its state and local returns for fiscal years after 2011. The Company is also open to assessment for foreign jurisdictions for fiscal years after 2007. Unrecognized tax benefits reflect the difference between positions taken or expected to be taken on income tax returns and the amounts reflected in the financial statements.

As of December 31, 2017, the Company had gross unrecognized tax benefits of $152,705. The total amount of gross unrecognized tax benefits that, if recognized, would affect the effective tax rate was $100,163. If recognized, a significant portion of the gross unrecognized tax benefits would be offset against an asset currently recorded in the Consolidated Balance Sheet. The accrued interest related to the gross unrecognized tax benefits, excluded from the amounts above, is $17,864. It is reasonably possible that within the next 12 months the amount of gross unrecognized tax benefits could be reduced by up to approximately $110,000 as a result of the revaluation of existing uncertain tax positions arising from developments in the examination process or the closure of tax statutes. Any increase in the amount of gross unrecognized tax benefits within the next 12 months is expected to be insignificant.