Income Taxes	9 Months Ended
Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	(10) INCOME TAXES The provision for income taxes for the three and nine months ended December 31, 2017 is based on our projected annual effective tax rate for fiscal year 2018, adjusted for specific items that are required to be recognized in the period in which they are incurred. Our effective tax rate and resulting provision for income taxes for the three and nine months ended December 31, 2017 was significantly impacted by the U.S. Tax Cuts and Jobs Act (the “U.S. Tax Act”), enacted on December 22, 2017. The U.S. Tax Act significantly revised the U.S. corporate income tax system by, among other things, lowering the U.S. corporate income tax rates, generally implementing a territorial tax system and imposing a one-time transition tax on the deemed repatriation of undistributed earnings of foreign subsidiaries (the “Transition Tax”). Our effective tax rate for the three and nine months ended December 31, 2017 was negative 1,062.5 percent and positive 37.3 percent, respectively, as compared to 83.3 percent and 18.8 percent, respectively for the same periods in fiscal year 2017. The effective tax rate for the three and nine months ended December 31, 2017 was negatively impacted by the provisional income tax effects of the U.S. Tax Act, offset by earnings realized in countries that have lower statutory tax rates and the recognition of excess tax benefits from stock-based compensation. Without the provisional tax charge of the U.S. Tax Act, our effective tax rate for the three and nine months ended December 31, 2017 would have been 37.5 percent and 11.9 percent, respectively. We have a March 31 fiscal year-end; therefore, the lower corporate tax rate enacted by the U.S. Tax Act will be phased in, resulting in a U.S. statutory federal rate of 31.6 percent for our fiscal year ending March 31, 2018, and 21.0 percent for subsequent fiscal years. When compared to the statutory rate of 31.6 percent, the effective tax rate for the three and nine months ended December 31, 2017 was higher primarily due to the income tax impacts of the U.S. Tax Act, offset by earnings realized in countries that have lower statutory tax rates and the recognition of excess tax benefits from stock-based compensation. We anticipate that the impact of excess tax benefits and tax deficiencies may result in significant fluctuations to our effective tax rate in the future. Excluding excess tax benefits, our effective tax rate would have been negative 1,075.0 percent and positive 43.6 percent, respectively, for the three and nine months ended December 31, 2017. We recorded a provision for income taxes of $170 million and $259 million for the three and nine months ended December 31, 2017, respectively, including $176 million which is a reasonable estimate of the impacts of the U.S. Tax Act. We recorded a reasonable estimate of $151 million related to the Transition Tax. The final calculations of the Transition Tax may differ from our estimates, potentially materially, due to, among other things, changes in interpretations of the U.S. Tax Act, our analysis of the U.S. Tax Act, or any updates or changes to estimates that we have utilized to calculate the transition impacts, including impacts from changes to current year earnings estimates and assertions. In addition, we provisionally recorded a tax charge related to the remeasurement of U.S. deferred tax assets and liabilities as a result of the reduction of the U.S. corporate tax rate and a tax benefit related to the deferred tax impacts of global intangible income. The impact of these, as well as certain other charges and benefits, were not material individually, or in the aggregate, and are provisional for the same reasons as stated above. Reasonable estimates of the impacts of the U.S. Tax Act are provided in accordance with SEC guidance that allows for a measurement period of up to one year after the enactment date of the U.S. Tax Act to finalize the recording of the related tax impacts. We expect to complete the accounting under the U.S. Tax Act as soon as practicable, but in no event later than one year from the enactment date of the U.S. Tax Act. We file income tax returns and are subject to income tax examinations in various jurisdictions with respect to fiscal years after 2008. The timing and potential resolution of income tax examinations is highly uncertain. While we continue to measure our uncertain tax positions, the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued. It is reasonably possible that a reduction of up to $45 million of unrecognized tax benefits may occur within the next 12 months, a portion of which would impact our effective tax rate. The actual amount could vary significantly depending on the ultimate timing and nature of any settlements.

(10) INCOME TAXES

The provision for income taxes for the three and nine months ended December 31, 2017 is based on our projected annual effective tax rate for fiscal year 2018, adjusted for specific items that are required to be recognized in the period in which they are incurred. Our effective tax rate and resulting provision for income taxes for the three and nine months ended December 31, 2017 was significantly impacted by the U.S. Tax Cuts and Jobs Act (the “U.S. Tax Act”), enacted on December 22, 2017. The U.S. Tax Act significantly revised the U.S. corporate income tax system by, among other things, lowering the U.S. corporate income tax rates, generally implementing a territorial tax system and imposing a one-time transition tax on the deemed repatriation of undistributed earnings of foreign subsidiaries (the “Transition Tax”).

Our effective tax rate for the three and nine months ended December 31, 2017 was negative 1,062.5 percent and positive 37.3 percent, respectively, as compared to 83.3 percent and 18.8 percent, respectively for the same periods in fiscal year 2017. The effective tax rate for the three and nine months ended December 31, 2017 was negatively impacted by the provisional income tax effects of the U.S. Tax Act, offset by earnings realized in countries that have lower statutory tax rates and the recognition of excess tax benefits from stock-based compensation. Without the provisional tax charge of the U.S. Tax Act, our effective tax rate for the three and nine months ended December 31, 2017 would have been 37.5 percent and 11.9 percent, respectively.

We have a March 31 fiscal year-end; therefore, the lower corporate tax rate enacted by the U.S. Tax Act will be phased in, resulting in a U.S. statutory federal rate of 31.6 percent for our fiscal year ending March 31, 2018, and 21.0 percent for subsequent fiscal years. When compared to the statutory rate of 31.6 percent, the effective tax rate for the three and nine months ended December 31, 2017 was higher primarily due to the income tax impacts of the U.S. Tax Act, offset by earnings realized in countries that have lower statutory tax rates and the recognition of excess tax benefits from stock-based compensation. We anticipate that the impact of excess tax benefits and tax deficiencies may result in significant fluctuations to our effective tax rate in the future. Excluding excess tax benefits, our effective tax rate would have been negative 1,075.0 percent and positive 43.6 percent, respectively, for the three and nine months ended December 31, 2017.

We recorded a provision for income taxes of $170 million and $259 million for the three and nine months ended December 31, 2017, respectively, including $176 million which is a reasonable estimate of the impacts of the U.S. Tax Act. We recorded a reasonable estimate of $151 million related to the Transition Tax. The final calculations of the Transition Tax may differ from our estimates, potentially materially, due to, among other things, changes in interpretations of the U.S. Tax Act, our analysis of the U.S. Tax Act, or any updates or changes to estimates that we have utilized to calculate the transition impacts, including impacts from changes to current year earnings estimates and assertions.

In addition, we provisionally recorded a tax charge related to the remeasurement of U.S. deferred tax assets and liabilities as a result of the reduction of the U.S. corporate tax rate and a tax benefit related to the deferred tax impacts of global intangible income. The impact of these, as well as certain other charges and benefits, were not material individually, or in the aggregate, and are provisional for the same reasons as stated above.

Reasonable estimates of the impacts of the U.S. Tax Act are provided in accordance with SEC guidance that allows for a measurement period of up to one year after the enactment date of the U.S. Tax Act to finalize the recording of the related tax impacts. We expect to complete the accounting under the U.S. Tax Act as soon as practicable, but in no event later than one year from the enactment date of the U.S. Tax Act.

We file income tax returns and are subject to income tax examinations in various jurisdictions with respect to fiscal years after 2008. The timing and potential resolution of income tax examinations is highly uncertain. While we continue to measure our uncertain tax positions, the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued. It is reasonably possible that a reduction of up to $45 million of unrecognized tax benefits may occur within the next 12 months, a portion of which would impact our effective tax rate. The actual amount could vary significantly depending on the ultimate timing and nature of any settlements.