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Derivative Financial Instruments and Hedging - Additional Information (Detail) In Millions | 12 Months Ended
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Mar. 31, 2011 USD ($) | Mar. 31, 2011 JPY (¥) | Mar. 31, 2010 JPY (¥) | Mar. 31, 2009 JPY (¥)
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net gains (losses) on cash flow hedges reclassified from accumulated other comprehensive income (loss) into earnings | $ (3) | ¥ (211) | ¥ 824 | ¥ 157
Net gains (losses), which represent the total ineffectiveness of cash flow hedges recorded in earnings |  |  |  | 3
Net derivative losses included in accumulated other comprehensive income (loss), that will be reclassified into earnings within fiscal 2012 | (66) | (5,456) |  |
Net gains (losses) hedge ineffectiveness associated with instruments designated as fair value hedges recorded in earnings | $ (3) | ¥ (231) | ¥ (307) | ¥ (20)

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- Definition The amount of net gains (losses) on a cash flow hedge reclassified in the period to earnings from accumulated other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1) + Details
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- Definition The estimated net amount of existing gains (losses) on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(2) + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + Details
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- Definition The net gain or loss recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1) + Details
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- Definition Net gain (loss) recognized in earnings during the reporting period representing the amount of the fair value of the hedges' ineffectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) + Details
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