INCOME TAXES (Notes)	6 Months Ended
Apr. 30, 2019
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES For the three and six months ended April 30, 2019, the company's income tax expense was $36 million with an effective tax rate of 16.5 percent and an income tax benefit of $220 million with an effective tax rate of (47.2) percent, respectively. For the six months ended April 30, 2019, our effective tax rate and the resulting provision for income taxes were significantly impacted by the discrete benefit of $299 million related to the restructuring and extension of the company’s tax incentive in Singapore. The income tax provision for the three and six months ended April 30, 2019 also includes the excess tax benefits from stock-based compensation of $3 million and $7 million, respectively. For the three and six months ended April 30, 2018, the company's income tax expense was $22 million with an effective tax rate of 9.7 percent and $575 million with an effective tax rate of 125.0 percent, respectively. The effective tax rate and the provision for income taxes were significantly impacted by a discrete charge of $533 million related to the enactment of the Tax Act. The income taxes provision for the three and six months ended April 30, 2018 also included the excess tax benefits from stock-based compensation of $7 million and $18 million, respectively. 2017 U.S. Tax Reform - Tax Cuts and Jobs Act On December 22, 2017, the Tax Act was enacted into law. The Tax Act enacted significant changes affecting our fiscal year 2018, including, but not limited to, (1) reducing the U.S. federal corporate tax rate and (2) imposing a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries that had not been previously taxed in the U.S. The Tax Act also establishes new tax provisions affecting our fiscal year 2019, including, but not limited to, (1) creating a new provision designed to tax global intangible low-tax income (“GILTI”); (2) generally eliminating U.S. federal taxes on dividends from foreign subsidiaries; (3) eliminating the corporate alternative minimum tax (“AMT”); (4) creating the base erosion anti-abuse tax (“BEAT”); (5) establishing a deduction for foreign derived intangible income ("FDII"); (6) repealing the domestic production activity deduction; and (7) establishing new limitations on deductible interest expense and certain executive compensation. GILTI: The Tax Act subjects a U.S. corporation to tax on its GILTI. U.S. GAAP allows companies to make an accounting policy election to either (1) treat taxes due on future GILTI inclusions in the U.S. taxable income as a current-period expense when incurred (“period cost method”) or (2) factoring such amounts into a company’s measurement of its deferred taxes (“deferred method”). We have completed our analysis and elected to treat GILTI as a “current period cost”. In the U.S., tax years remain open back to the year 2015 for federal income tax purposes and the year 2000 for significant states. In other major jurisdictions where the company conducts business, the tax years generally remain open back to the year 2001. There were no substantial changes from our 2018 Annual Report on Form 10-K to the status of the open tax years in the first six months of fiscal year 2019. It is reasonably possible there could be significant changes to our unrecognized tax benefits in the next twelve months due to either the expiration of a statute of limitation or a tax audit settlement. Given the number of years and numerous matters that remain subject to examination in various tax jurisdictions, management is unable to estimate the range of possible changes to the balance of our unrecognized tax benefits. The company will continue to assess the impact of the further guidance from federal and state tax authorities on its business and consolidated financial statements. Any future adjustments will be recognized as discrete income tax expense or benefit in the period the adjustments are determined.

INCOME TAXES

For the three and six months ended April 30, 2019, the company's income tax expense was $36 million with an effective tax rate of 16.5 percent and an income tax benefit of $220 million with an effective tax rate of (47.2) percent, respectively. For the six months ended April 30, 2019, our effective tax rate and the resulting provision for income taxes were significantly impacted by the discrete benefit of $299 million related to the restructuring and extension of the company’s tax incentive in Singapore. The income tax provision for the three and six months ended April 30, 2019 also includes the excess tax benefits from stock-based compensation of $3 million and $7 million, respectively.

For the three and six months ended April 30, 2018, the company's income tax expense was $22 million with an effective tax rate of 9.7 percent and $575 million with an effective tax rate of 125.0 percent, respectively. The effective tax rate and the provision for income taxes were significantly impacted by a discrete charge of $533 million related to the enactment of the Tax Act. The income taxes provision for the three and six months ended April 30, 2018 also included the excess tax benefits from stock-based compensation of $7 million and $18 million, respectively.

2017 U.S. Tax Reform - Tax Cuts and Jobs Act

On December 22, 2017, the Tax Act was enacted into law. The Tax Act enacted significant changes affecting our fiscal year 2018, including, but not limited to, (1) reducing the U.S. federal corporate tax rate and (2) imposing a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries that had not been previously taxed in the U.S.

The Tax Act also establishes new tax provisions affecting our fiscal year 2019, including, but not limited to, (1) creating a new provision designed to tax global intangible low-tax income (“GILTI”); (2) generally eliminating U.S. federal taxes on dividends from foreign subsidiaries; (3) eliminating the corporate alternative minimum tax (“AMT”); (4) creating the base erosion anti-abuse tax (“BEAT”); (5) establishing a deduction for foreign derived intangible income ("FDII"); (6) repealing the domestic production activity deduction; and (7) establishing new limitations on deductible interest expense and certain executive compensation.

GILTI: The Tax Act subjects a U.S. corporation to tax on its GILTI. U.S. GAAP allows companies to make an accounting policy election to either (1) treat taxes due on future GILTI inclusions in the U.S. taxable income as a current-period expense when incurred (“period cost method”) or (2) factoring such amounts into a company’s measurement of its deferred taxes (“deferred method”). We have completed our analysis and elected to treat GILTI as a “current period cost”.

In the U.S., tax years remain open back to the year 2015 for federal income tax purposes and the year 2000 for significant states. In other major jurisdictions where the company conducts business, the tax years generally remain open back to the year 2001. There were no substantial changes from our 2018 Annual Report on Form 10-K to the status of the open tax years in the first six months of fiscal year 2019.

It is reasonably possible there could be significant changes to our unrecognized tax benefits in the next twelve months due to either the expiration of a statute of limitation or a tax audit settlement. Given the number of years and numerous matters that remain subject to examination in various tax jurisdictions, management is unable to estimate the range of possible changes to the balance of our unrecognized tax benefits. The company will continue to assess the impact of the further guidance from federal and state tax authorities on its business and consolidated financial statements. Any future adjustments will be recognized as discrete income tax expense or benefit in the period the adjustments are determined.