New Accounting Pronouncements	9 Months Ended
Feb. 28, 2018
Accounting Changes And Error Corrections [Abstract]
New Accounting Pronouncements	NOTE 2 — NEW ACCOUNTING PRONOUNCEMENTS In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers,” which establishes a comprehensive revenue recognition standard that will supersede nearly all existing revenue recognition guidance under GAAP. The new standard prescribes a five-step model for recognizing revenue, which will require significant judgment in its application. The new standard requires disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Under the original issuance, the new standard would have applied to annual periods beginning after December 15, 2016, including interim periods therein. However, in August 2015, the FASB issued ASU 2015-14, which extends the standard effective date by one year and includes an option to apply the standard on the original effective date. The provisions of this ASU may be applied retrospectively to each prior reporting period presented, or on a modified retrospective basis by recognizing a cumulative catch-up transition amount at the date of initial application. We have selected the modified retrospective transition method, which we will apply upon adoption of the standard as of June 1, 2018. Given the scope of work required to implement the recognition and disclosure requirements under the new standard, we began our assessment process during fiscal 2016. Our progress to date includes a preliminary identification of areas which will require changes to policies, processes, systems or internal controls. We expect revenue recognition for our broad portfolio of products and services to remain largely unchanged. However, the guidance is expected to change the timing of revenue recognition in certain areas, including our accounting for long-term construction contracts. While these impacts are not expected to be material to our overall Consolidated Financial Statements, we do anticipate that the new disclosure requirements surrounding revenue recognition will be significant. We continue to assess all potential impacts of the guidance and given the stage of our adoption procedures as well as our normal ongoing business dynamics, our preliminary conclusions and assessments of the potential impacts on each of our different business units’ revenue streams are subject to change. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which increases lease transparency and comparability among organizations. Under the new standard, lessees will be required to recognize all assets and liabilities arising from leases on the balance sheet, with the exception of leases with a term of 12 months or less, which permits a lessee to make an accounting policy election by class of underlying asset not to recognize lease assets and liabilities. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and early adoption is permitted. The new standard requires the recognition and measurement of leases at the beginning of the earliest period presented using a modified retrospective approach, which includes a number of optional practical expedients that entities may elect to apply. We are currently evaluating the impact this guidance will have on our Consolidated Financial Statements. At a minimum, total assets and total liabilities will increase in the period the ASU is adopted. At February 28, 2018, our total undiscounted future minimum payments outstanding for operating lease obligations approximated $276.0 million. In August 2016, the FASB issued ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments,” which makes a number of changes meant to add or clarify guidance on the classification of certain cash receipts and payments in the statement of cash flows. The new guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. Upon adoption, entities must apply the guidance retrospectively to all periods presented. We are currently evaluating the impact this guidance will have on our Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-01, “Business Combinations: Clarifying the Definition of a Business,” with the objective of adding guidance to assist entities in evaluating whether transactions should be accounted for as acquisitions (disposals) of assets or of businesses. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. We are currently reviewing the impact this revised guidance will have on our Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment,” to eliminate step two from the goodwill impairment test in order to simplify the subsequent measurement of goodwill. The guidance is effective for fiscal years beginning after December 15, 2019. Early application is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Adoption of this guidance is not expected to have a material impact on our Consolidated Financial Statements. In March 2017, the FASB issued ASU 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We are currently reviewing the impact this guidance will have on our Consolidated Financial Statements. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities,” which simplifies hedge accounting through changes to both designation and measurement requirements. For hedges that qualify as highly effective, the new standard eliminates the requirement to separately measure and record hedge ineffectiveness, resulting in better alignment between the presentation of the effects of the hedging instrument and the hedged item in the financial statements. ASU No. 2017-12 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted in any interim period after issuance of the update. Our early adoption of this pronouncement during our current quarter ended November 30, 2017 did not have a material impact on our Consolidated Financial Statements. Refer to Note 6, “Derivatives and Hedging,” for further information.

NOTE 2 — NEW ACCOUNTING PRONOUNCEMENTS

In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers,” which establishes a comprehensive revenue recognition standard that will supersede nearly all existing revenue recognition guidance under GAAP. The new standard prescribes a five-step model for recognizing revenue, which will require significant judgment in its application. The new standard requires disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers.

Under the original issuance, the new standard would have applied to annual periods beginning after December 15, 2016, including interim periods therein. However, in August 2015, the FASB issued ASU 2015-14, which extends the standard effective date by one year and includes an option to apply the standard on the original effective date. The provisions of this ASU may be applied retrospectively to each prior reporting period presented, or on a modified retrospective basis by recognizing a cumulative catch-up transition amount at the date of initial application. We have selected the modified retrospective transition method, which we will apply upon adoption of the standard as of June 1, 2018.

Given the scope of work required to implement the recognition and disclosure requirements under the new standard, we began our assessment process during fiscal 2016. Our progress to date includes a preliminary identification of areas which will require changes to policies, processes, systems or internal controls. We expect revenue recognition for our broad portfolio of products and services to remain largely unchanged. However, the guidance is expected to change the timing of revenue recognition in certain areas, including our accounting for long-term construction contracts. While these impacts are not expected to be material to our overall Consolidated Financial Statements, we do anticipate that the new disclosure requirements surrounding revenue recognition will be significant. We continue to assess all potential impacts of the guidance and given the stage of our adoption procedures as well as our normal ongoing business dynamics, our preliminary conclusions and assessments of the potential impacts on each of our different business units’ revenue streams are subject to change.

In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which increases lease transparency and comparability among organizations. Under the new standard, lessees will be required to recognize all assets and liabilities arising from leases on the balance sheet, with the exception of leases with a term of 12 months or less, which permits a lessee to make an accounting policy election by class of underlying asset not to recognize lease assets and liabilities. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and early adoption is permitted. The new standard requires the recognition and measurement of leases at the beginning of the earliest period presented using a modified retrospective approach, which includes a number of optional practical expedients that entities may elect to apply. We are currently evaluating the impact this guidance will have on our Consolidated Financial Statements. At a minimum, total assets and total liabilities will increase in the period the ASU is adopted. At February 28, 2018, our total undiscounted future minimum payments outstanding for operating lease obligations approximated $276.0 million.

In August 2016, the FASB issued ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments,” which makes a number of changes meant to add or clarify guidance on the classification of certain cash receipts and payments in the statement of cash flows. The new guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. Upon adoption, entities must apply the guidance retrospectively to all periods presented. We are currently evaluating the impact this guidance will have on our Consolidated Financial Statements.

In January 2017, the FASB issued ASU 2017-01, “Business Combinations: Clarifying the Definition of a Business,” with the objective of adding guidance to assist entities in evaluating whether transactions should be accounted for as acquisitions (disposals) of assets or of businesses. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. We are currently reviewing the impact this revised guidance will have on our Consolidated Financial Statements.

In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment,” to eliminate step two from the goodwill impairment test in order to simplify the subsequent measurement of goodwill. The guidance is effective for fiscal years beginning after December 15, 2019. Early application is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Adoption of this guidance is not expected to have a material impact on our Consolidated Financial Statements.

In March 2017, the FASB issued ASU 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We are currently reviewing the impact this guidance will have on our Consolidated Financial Statements.

In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities,” which simplifies hedge accounting through changes to both designation and measurement requirements. For hedges that qualify as highly effective, the new standard eliminates the requirement to separately measure and record hedge ineffectiveness, resulting in better alignment between the presentation of the effects of the hedging instrument and the hedged item in the financial statements. ASU No. 2017-12 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted in any interim period after issuance of the update. Our early adoption of this pronouncement during our current quarter ended November 30, 2017 did not have a material impact on our Consolidated Financial Statements. Refer to Note 6, “Derivatives and Hedging,” for further information.