The amount of property, plant, and equipment recognized as of the acquisition date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Face (par) amount of debt instrument at time of issuance.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Latest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

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Earliest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Long-Term Debt - Narrative (Detail)	9 Months Ended	12 Months Ended
Long-Term Debt - Narrative (Detail)	Feb. 29, 2016	May 31, 2016 USD ($)	May 31, 2016 JPY (¥)
Corporate bonds, 2.25% due May 1, 2023 and 3.63% due May 1, 2043
Debt Instrument [Line Items]
Percent of aggregate principal amount of the notes to be redeemed		100.00%
3.88% Corporate bond, payable November 1, 2045
Debt Instrument [Line Items]
Percent of aggregate principal amount of the notes to be redeemed	100.00%
6.2% and 6.79% Promissory notes, payable April 1, 2017 and January 1, 2018
Debt Instrument [Line Items]
Long-term debt, original principal		$ 59,000,000
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
Debt instrument, minimum maturity date		Aug. 20, 2001
Debt instrument, maximum maturity date		Nov. 20, 2020
Corporate Bond Payables \| 5.15% Corporate bond, payable October 15, 2015
Debt Instrument [Line Items]
Debt instrument, maturity date		Oct. 15, 2015
Long-term debt, original principal		$ 100,000,000
Corporate Bond Payables \| 2.25% Corporate bond, payable May 1, 2023
Debt Instrument [Line Items]
Debt instrument, maturity date		May 01, 2023
Long-term debt, original principal		$ 500,000,000
Corporate Bond Payables \| 3.63% Corporate bond, payable May 1, 2043
Debt Instrument [Line Items]
Debt instrument, maturity date		May 01, 2043
Long-term debt, original principal		$ 500,000,000
Corporate Bond Payables \| 3.88% Corporate bond, payable November 1, 2045
Debt Instrument [Line Items]
Debt instrument, maturity date		Nov. 01, 2045
Long-term debt, original principal		$ 1,000,000,000
Notes Payable \| 6.20% Promissory note, payable April 1, 2017
Debt Instrument [Line Items]
Debt instrument, maturity date		Apr. 01, 2017
Long-term debt, original principal		$ 40,000,000
Notes Payable \| 6.79% Promissory note, payable January 1, 2018
Debt Instrument [Line Items]
Debt instrument, maturity date		Jan. 01, 2018
Long-term debt, original principal		$ 19,000,000
Notes Payable \| 2.60% Japanese Yen note, maturing August 20, 2001 through November 20, 2020
Debt Instrument [Line Items]
Debt instrument, maturity date		Nov. 20, 2020
Long-term debt, original principal \| ¥			9,000,000,000
Notes Payable \| 2.00% Japanese Yen note, maturing August 20, 2001 through November 20, 2020
Debt Instrument [Line Items]
Debt instrument, maturity date		Nov. 20, 2020
Long-term debt, original principal \| ¥			¥ 4,000,000,000
Land and Building [Member]
Debt Instrument [Line Items]
Purchase of properties		$ 85,000,000