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Notional Amounts of Derivative Instruments and Fair Values of Derivative Instruments in Consolidated Balance Sheets (Detail) In Millions | Mar. 31, 2011 Derivatives designated as hedging instruments and other Interest rate swap agreements USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Interest rate swap agreements JPY (¥) | Mar. 31, 2010 Derivatives designated as hedging instruments and other Interest rate swap agreements JPY (¥) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Interest rate swap agreements Other Receivables USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Interest rate swap agreements Other Receivables JPY (¥) | Mar. 31, 2010 Derivatives designated as hedging instruments and other Interest rate swap agreements Other Receivables JPY (¥) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Interest rate swap agreements Trade notes, accounts payable and other liabilities USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Interest rate swap agreements Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2010 Derivatives designated as hedging instruments and other Interest rate swap agreements Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Futures, Foreign exchange contracts USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Futures, Foreign exchange contracts JPY (¥) | Mar. 31, 2010 Derivatives designated as hedging instruments and other Futures, Foreign exchange contracts JPY (¥) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Futures, Foreign exchange contracts Other Receivables USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Futures, Foreign exchange contracts Other Receivables JPY (¥) | Mar. 31, 2010 Derivatives designated as hedging instruments and other Futures, Foreign exchange contracts Other Receivables JPY (¥) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Futures, Foreign exchange contracts Trade notes, accounts payable and other liabilities USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Futures, Foreign exchange contracts Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2010 Derivatives designated as hedging instruments and other Futures, Foreign exchange contracts Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Foreign currency swap agreements USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Foreign currency swap agreements JPY (¥) | Mar. 31, 2010 Derivatives designated as hedging instruments and other Foreign currency swap agreements JPY (¥) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Foreign currency swap agreements Other Receivables USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Foreign currency swap agreements Other Receivables JPY (¥) | Mar. 31, 2010 Derivatives designated as hedging instruments and other Foreign currency swap agreements Other Receivables JPY (¥) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Foreign currency swap agreements Trade notes, accounts payable and other liabilities USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Foreign currency swap agreements Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2010 Derivatives designated as hedging instruments and other Foreign currency swap agreements Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Foreign currency long-term-debt USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Foreign currency long-term-debt JPY (¥) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Foreign currency long-term-debt Other Receivables USD ($) | Mar. 31, 2011 Derivatives designated as hedging instruments and other Foreign currency long-term-debt Trade notes, accounts payable and other liabilities USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Interest rate swap agreements USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Interest rate swap agreements JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Interest rate swap agreements JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Interest rate swap agreements Other Receivables USD ($) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Interest rate swap agreements Other Receivables JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Interest rate swap agreements Trade notes, accounts payable and other liabilities USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Interest rate swap agreements Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Interest rate swap agreements Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Futures, Foreign exchange contracts USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Futures, Foreign exchange contracts JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Futures, Foreign exchange contracts JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Futures, Foreign exchange contracts Other Receivables USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Futures, Foreign exchange contracts Other Receivables JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Futures, Foreign exchange contracts Other Receivables JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Futures, Foreign exchange contracts Trade notes, accounts payable and other liabilities USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Futures, Foreign exchange contracts Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Futures, Foreign exchange contracts Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Foreign currency swap agreements USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Foreign currency swap agreements JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Foreign currency swap agreements JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Foreign currency swap agreements Other Receivables USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Foreign currency swap agreements Other Receivables JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Foreign currency swap agreements Other Receivables JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Foreign currency swap agreements Trade notes, accounts payable and other liabilities USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Foreign currency swap agreements Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Foreign currency swap agreements Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Options held/written, Caps held JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Options held/written, Caps held Other Receivables JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Options held/written, Caps held Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Credit derivatives held/written USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Credit derivatives held/written JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Credit derivatives held/written JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Credit derivatives held/written Other Receivables USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Credit derivatives held/written Other Receivables JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Credit derivatives held/written Other Receivables JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Credit derivatives held/written Trade notes, accounts payable and other liabilities USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Credit derivatives held/written Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2010 Trading derivatives or derivatives not designated as hedging instruments Credit derivatives held/written Trade notes, accounts payable and other liabilities JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Options Held (Written), Caps Held and Other USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Options Held (Written), Caps Held and Other JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Options Held (Written), Caps Held and Other Other Receivables USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Options Held (Written), Caps Held and Other Other Receivables JPY (¥) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Options Held (Written), Caps Held and Other Trade notes, accounts payable and other liabilities USD ($) | Mar. 31, 2011 Trading derivatives or derivatives not designated as hedging instruments Options Held (Written), Caps Held and Other Trade notes, accounts payable and other liabilities JPY (¥)
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Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | $ 3,321 | ¥ 276,132 | ¥ 170,193 |  |  |  |  |  |  | $ 1,964 | ¥ 163,342 | ¥ 171,681 |  |  |  |  |  |  | $ 2,158 | ¥ 179,429 | ¥ 207,049 |  |  |  |  |  |  | $ 236 | ¥ 19,616 |  |  | $ 38 | ¥ 3,129 | ¥ 9,096 |  |  |  |  |  | $ 2,738 | ¥ 227,640 | ¥ 379,754 |  |  |  |  |  |  | $ 121 | ¥ 10,073 | ¥ 10,567 |  |  |  |  |  |  | ¥ 21,690 |  |  | $ 433 | ¥ 36,027 | ¥ 48,490 |  |  |  |  |  |  | $ 1,492 | ¥ 124,034 |  |  |  |
Asset derivatives Fair value |  |  |  | 25 | 2,070 | 191 |  |  |  |  |  |  | 13 | 1,075 | 834 |  |  |  |  |  |  | 157 | 13,072 | 12,671 |  |  |  |  |  | 0 |  |  |  |  | 0 | 1 |  |  |  |  |  |  | 19 | 1,558 | 1,241 |  |  |  |  |  |  | 20 | 1,694 | 1,053 |  |  |  |  | 555 |  |  |  |  | 1 | 49 | 528 |  |  |  |  |  | 42 | 3,467 |  |
Liability derivatives Fair value |  |  |  |  |  |  | $ 15 | ¥ 1,273 | ¥ 2,862 |  |  |  |  |  |  | $ 42 | ¥ 3,509 | ¥ 4,968 |  |  |  |  |  |  | $ 383 | ¥ 31,830 | ¥ 22,053 |  |  |  | $ 0 |  |  |  |  |  | $ 1 | ¥ 47 | ¥ 94 |  |  |  |  |  |  | $ 18 | ¥ 1,459 | ¥ 769 |  |  |  |  |  |  | $ 20 | ¥ 1,651 | ¥ 1,000 |  |  | ¥ 189 |  |  |  |  |  |  | $ 3 | ¥ 236 | ¥ 40 |  |  |  |  | $ 25 | ¥ 2,071

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- Definition Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 + Details
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- Definition Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 + 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 Aggregate notional amount of all derivatives. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument. + Details
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