Recent Accounting Guidance	12 Months Ended
May 31, 2018
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Guidance	NOTE 2: RECENT ACCOUNTING GUIDANCE New accounting rules and disclosure requirements can significantly impact our reported results and the comparability of our financial statements. We believe the following new accounting guidance is relevant to the readers of our financial statements. In December 2017, the Securities and Exchange Commission (“SEC”) staff issued Staff Accounting Bulletin (“SAB”) 118 to provide guidance to registrants in accounting for income taxes under the Tax Cuts and Jobs Act (“TCJA”). See Note 12 for further discussion related to applying this guidance. During the first quarter of 2018, we early adopted the Accounting Standards Update issued by the Financial Accounting Standards Board (“FASB”) related to intra-entity transfers of assets other than inventory. This update requires companies to recognize the income tax consequences of intra-entity transfers of assets other than inventory when the transfer occurs, as opposed to when the assets are ultimately sold to an outside party. As a result of this new guidance, during 2018 we recorded a $50 million income tax benefit and a $14 million adjustment to retained earnings for the cumulative effect at adoption. In January 2017, the FASB issued an Accounting Standards Update that simplifies the subsequent measurement of goodwill, eliminating Step 2 from the goodwill impairment test. Under this new guidance, an entity should perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value, up to the total amount of goodwill allocated to that reporting unit. We adopted the guidance during the fourth quarter of 2018. In 2014, the FASB and International Accounting Standards Board issued a new accounting standard that will supersede virtually all existing revenue recognition guidance under generally accepted accounting principles in the United States. The fundamental principles of the new guidance are that companies should recognize revenue in a manner that reflects the timing of the transfer of services to customers and the amount of revenue recognized reflects the consideration that a company expects to receive for the goods and services provided. The new guidance establishes a five-step approach for the recognition of revenue. We finalized our assessment of the impact of this new standard on our consolidated financial statements and related disclosures, including detailed contract reviews, and adopted this standard as of June 1, 2018 (fiscal 2019). We have analyzed our internal control over financial reporting framework and determined that there will be new controls around contract inception and contract modification, as well as periodic review of material contracts. We determined that the new guidance will not have a material impact on our revenue recognition policies, practices or systems. In March 2017, the FASB issued an Accounting Standards Update that changes how employers that sponsor defined benefit pension or other postretirement benefit plans present the net periodic benefit cost in the income statement. This new guidance requires entities to report the service cost component in the same line item or items as other compensation costs. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component outside of income from operations. This standard will impact our operating income but will have no impact on our net income or earnings per share. For example, adoption of this guidance would have reduced operating income by $598 million in 2018 and by $471 million in 2017, but would not have impacted our net income in these periods. This new guidance is effective June 1, 2018 and will be applied retrospectively. In 2016, the FASB issued a new lease accounting standard which requires lessees to put most leases on their balance sheets but recognize the expenses in their income statements in a manner similar to current practice. The new standard states that a lessee will recognize a lease liability for the obligation to make lease payments and a right-of-use asset for the right to use the underlying asset for the lease term. Expenses related to leases determined to be operating leases will be recognized on a straight-line basis, while those determined to be financing leases will be recognized following a front-loaded expense profile in which interest and amortization are presented separately in the income statement. Based on our lease portfolio, we currently anticipate recognizing a lease liability and related right-of-use asset on our balance sheet in excess of $13 billion, with an immaterial impact on our income statement compared to the current lease accounting model. However, the ultimate impact of the standard will depend on the company’s lease portfolio as of the adoption date. We are currently accumulating all of the necessary information required to properly account for the leases under the new standard. Additionally, we are implementing an enterprise-wide lease management system to assist in the accounting and are evaluating additional changes to our processes and internal controls to ensure we meet the standard’s reporting and disclosure requirements. These changes will be effective June 1, 2019 (fiscal 2020). In February 2018, the FASB issued an Accounting Standards Update that will permit companies to reclassify the income tax effect of the TCJA on items within AOCI to retained earnings. These changes will be effective June 1, 2019 (fiscal 2020).

NOTE 2: RECENT ACCOUNTING GUIDANCE

New accounting rules and disclosure requirements can significantly impact our reported results and the comparability of our financial statements. We believe the following new accounting guidance is relevant to the readers of our financial statements.

In December 2017, the Securities and Exchange Commission (“SEC”) staff issued Staff Accounting Bulletin (“SAB”) 118 to provide guidance to registrants in accounting for income taxes under the Tax Cuts and Jobs Act (“TCJA”). See Note 12 for further discussion related to applying this guidance.

During the first quarter of 2018, we early adopted the Accounting Standards Update issued by the Financial Accounting Standards Board (“FASB”) related to intra-entity transfers of assets other than inventory. This update requires companies to recognize the income tax consequences of intra-entity transfers of assets other than inventory when the transfer occurs, as opposed to when the assets are ultimately sold to an outside party. As a result of this new guidance, during 2018 we recorded a $50 million income tax benefit and a $14 million adjustment to retained earnings for the cumulative effect at adoption.

In January 2017, the FASB issued an Accounting Standards Update that simplifies the subsequent measurement of goodwill, eliminating Step 2 from the goodwill impairment test. Under this new guidance, an entity should perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value, up to the total amount of goodwill allocated to that reporting unit. We adopted the guidance during the fourth quarter of 2018.

In 2014, the FASB and International Accounting Standards Board issued a new accounting standard that will supersede virtually all existing revenue recognition guidance under generally accepted accounting principles in the United States. The fundamental principles of the new guidance are that companies should recognize revenue in a manner that reflects the timing of the transfer of services to customers and the amount of revenue recognized reflects the consideration that a company expects to receive for the goods and services provided. The new guidance establishes a five-step approach for the recognition of revenue. We finalized our assessment of the impact of this new standard on our consolidated financial statements and related disclosures, including detailed contract reviews, and adopted this standard as of June 1, 2018 (fiscal 2019). We have analyzed our internal control over financial reporting framework and determined that there will be new controls around contract inception and contract modification, as well as periodic review of material contracts. We determined that the new guidance will not have a material impact on our revenue recognition policies, practices or systems.

In March 2017, the FASB issued an Accounting Standards Update that changes how employers that sponsor defined benefit pension or other postretirement benefit plans present the net periodic benefit cost in the income statement. This new guidance requires entities to report the service cost component in the same line item or items as other compensation costs. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component outside of income from operations. This standard will impact our operating income but will have no impact on our net income or earnings per share. For example, adoption of this guidance would have reduced operating income by $598 million in 2018 and by $471 million in 2017, but would not have impacted our net income in these periods. This new guidance is effective June 1, 2018 and will be applied retrospectively.

In 2016, the FASB issued a new lease accounting standard which requires lessees to put most leases on their balance sheets but recognize the expenses in their income statements in a manner similar to current practice. The new standard states that a lessee will recognize a lease liability for the obligation to make lease payments and a right-of-use asset for the right to use the underlying asset for the lease term. Expenses related to leases determined to be operating leases will be recognized on a straight-line basis, while those determined to be financing leases will be recognized following a front-loaded expense profile in which interest and amortization are presented separately in the income statement. Based on our lease portfolio, we currently anticipate recognizing a lease liability and related right-of-use asset on our balance sheet in excess of $13 billion, with an immaterial impact on our income statement compared to the current lease accounting model. However, the ultimate impact of the standard will depend on the company’s lease portfolio as of the adoption date. We are currently accumulating all of the necessary information required to properly account for the leases under the new standard. Additionally, we are implementing an enterprise-wide lease management system to assist in the accounting and are evaluating additional changes to our processes and internal controls to ensure we meet the standard’s reporting and disclosure requirements. These changes will be effective June 1, 2019 (fiscal 2020).

In February 2018, the FASB issued an Accounting Standards Update that will permit companies to reclassify the income tax effect of the TCJA on items within AOCI to retained earnings. These changes will be effective June 1, 2019 (fiscal 2020).