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Operating Segments and Related Information - Additional Information (Detail) $ in Millions | 12 Months Ended
--- | ---
May 31, 2018 USD ($) customer | May 31, 2017 USD ($) customer | May 31, 2016 USD ($) customer
Sales Revenue, Net |  |  |
Regional Reporting Disclosure [Line Items] |  |  |
Number of customers exceeding risk threshold | customer | 0 | 0 | 0
Concentration risk percentage | 10.00% |  |
UNITED STATES |  |  |
Regional Reporting Disclosure [Line Items] |  |  |
Revenue | $ 15,314 | $ 15,778 | $ 15,304
Long-lived assets attributable to operations (Domestic) | 2,930 | 2,629 |
Japan |  |  |
Regional Reporting Disclosure [Line Items] |  |  |
Long-lived assets attributable to operations (Domestic) | 237 | 223 |
BELGIUM |  |  |
Regional Reporting Disclosure [Line Items] |  |  |
Long-lived assets attributable to operations (Domestic) | 534 | 390 |
CHINA |  |  |
Regional Reporting Disclosure [Line Items] |  |  |
Long-lived assets attributable to operations (Domestic) | $ 262 | $ 232 |

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