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Summary Debt Outstanding Based On Stated Maturities (Parenthetical) (Detail) | 12 Months Ended
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Mar. 31, 2016
3.90% September 2010 Senior Notes Due Fiscal 2018 |
Debt [Line Items] |
Debt instrument interest rate | 3.90%
Debt Instrument Maturity Period | 2018
3.95% September 2010 Senior Notes Due Fiscal 2018 |
Debt [Line Items] |
Debt instrument interest rate | 3.95%
Debt Instrument Maturity Period | 2018
4.12% September 2010 Senior Notes Due Fiscal 2019 |
Debt [Line Items] |
Debt instrument interest rate | 4.12%
Debt Instrument Maturity Period | 2019
4.17% September 2010 Senior Notes Due Fiscal 2019 |
Debt [Line Items] |
Debt instrument interest rate | 4.17%
Debt Instrument Maturity Period | 2019
4.33% September 2010 Senior Notes Due Fiscal 2020 |
Debt [Line Items] |
Debt instrument interest rate | 4.33%
Debt Instrument Maturity Period | 2020
4.51% September 2010 Senior Notes Due Fiscal 2021 |
Debt [Line Items] |
Debt instrument interest rate | 4.51%
Debt Instrument Maturity Period | 2021
4.56% September 2010 Senior Notes Due Fiscal 2021 |
Debt [Line Items] |
Debt instrument interest rate | 4.56%
Debt Instrument Maturity Period | 2021
4.61% September 2010 Senior Notes Due Fiscal 2023 |
Debt [Line Items] |
Debt instrument interest rate | 4.61%
Debt Instrument Maturity Period | 2023
4.06% August 2011 Senior Notes Due Fiscal 2019 |
Debt [Line Items] |
Debt instrument interest rate | 4.06%
Debt Instrument Maturity Period | 2019
4.54% August 2011 Senior Notes Due Fiscal 2022 |
Debt [Line Items] |
Debt instrument interest rate | 4.54%
Debt Instrument Maturity Period | 2022
4.64% August 2011 Senior Notes Due Fiscal 2022 |
Debt [Line Items] |
Debt instrument interest rate | 4.64%
Debt Instrument Maturity Period | 2022
4.26% September 2013 senior notes due fiscal 2021 |
Debt [Line Items] |
Debt instrument interest rate | 4.26%
Debt Instrument Maturity Period | 2021
5.01% September 2013 senior notes due fiscal 2024 |
Debt [Line Items] |
Debt instrument interest rate | 5.01%
Debt Instrument Maturity Period | 2024
5.01% September 2013 senior notes due fiscal 2024 |
Debt [Line Items] |
Debt instrument interest rate | 5.16%
Debt Instrument Maturity Period | 2026
Norwegian Kroner Denominated Notes Due Fiscal Two Thousand Twenty Five |
Debt [Line Items] |
Debt Instrument Maturity Period | 2025
Norwegian Kroner Denominated Notes Due Fiscal Two Thousand Twenty Six |
Debt [Line Items] |
Debt Instrument Maturity Period | 2026
United States Dollar Denominated Borrowing Agreement Due Fiscal Two Thousand Twenty Seven |
Debt [Line Items] |
Debt Instrument Maturity Period | 2027
United States Dollar Denominated Borrowing Agreement Due Fiscal Two Thousand Twenty Eight |
Debt [Line Items] |
Debt Instrument Maturity Period | 2028
Term Loan Facility Due Twenty Twenty |
Debt [Line Items] |
Debt Instrument Maturity Period | 2020
Revolving Line Of Credit Due Fiscal Twenty Twenty |
Debt [Line Items] |
Debt Instrument Maturity Period | 2020

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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