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Summary of Accounts Receivable Net of Allowances and Net Contract Assets (Liabilities) (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Aug. 31, 2019 | May 31, 2019
Disaggregation Of Revenue [Line Items] |  |
Accounts receivable, less allowance | $ 1,109,259 | $ 1,232,350
Contract assets | 26,464 | 21,628
Contract liabilities - short-term | (27,402) | (25,896)
Net Contract Liabilities | (938) | $ (4,268)
Change in Contract with Customer, Asset and Liability [Abstract] |  |
Change in accounts receivable, less allowance | (123,091) |
Change in contract assets | 4,836 |
Change in Net Contract Liabilities | $ 3,330 |
Percentage of change in accounts receivable, less allowance | (10.00%) |
Percentage of change in contract assets | 22.40% |
Percentage of change in Net Contract Liabilities | (78.00%) |
Short-term |  |
Change in Contract with Customer, Asset and Liability [Abstract] |  |
Change in contract liabilities | $ (1,506) |
Percentage of change in contract liabilities | 5.80% |

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