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Long-Term Debt - Narrative (Detail) | 12 Months Ended
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May 31, 2020 JPY (¥)
Corporate Bond Payables |
Debt Instrument [Line Items] |
Percent of aggregate principal amount of the notes to be redeemed | 100.00%
Notes Payable | 2.6% and 2.0% Japanese Yen note, maturing August 20, 2001 through November 20, 2020 |
Debt Instrument [Line Items] |
Long-term debt, original principal | ¥ 13,000,000,000.0

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