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v2.3.0.11

Write-Downs of Long-Lived Assets - Additional Information (Detail) In Millions, unless otherwise specified | 12 Months Ended
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Mar. 31, 2011 USD ($) | Mar. 31, 2011 JPY (¥) | Mar. 31, 2010 JPY (¥) | Mar. 31, 2009 JPY (¥) | Mar. 31, 2011 Office Building USD ($) Location | Mar. 31, 2011 Office Building JPY (¥) | Mar. 31, 2010 Office Building JPY (¥) Location | Mar. 31, 2009 Office Building JPY (¥) Location | Mar. 31, 2011 Condominiums Held for Sale JPY (¥) Location | Mar. 31, 2010 Condominiums Held for Sale JPY (¥) Location | Mar. 31, 2009 Condominiums Held for Sale JPY (¥) Location | Mar. 31, 2011 Condominiums JPY (¥) Location | Mar. 31, 2011 Commercial Facilities Other Than Office USD ($) Location | Mar. 31, 2011 Commercial Facilities Other Than Office JPY (¥) | Mar. 31, 2010 Commercial Facilities Other Than Office JPY (¥) Location | Mar. 31, 2011 Property, Plant and Equipment, Other Types USD ($) | Mar. 31, 2011 Property, Plant and Equipment, Other Types JPY (¥) | Mar. 31, 2010 Property, Plant and Equipment, Other Types JPY (¥) | Mar. 31, 2009 Property, Plant and Equipment, Other Types JPY (¥)
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment losses | $ 244 | ¥ 20,310 | ¥ 9,483 | ¥ 3,829 | $ 30 | ¥ 2,464 | ¥ 1,025 | ¥ 3,590 | ¥ 1,353 | ¥ 2,451 | ¥ 156 | ¥ 2,758 | $ 64 | ¥ 5,284 | ¥ 1,461 | $ 102 | ¥ 8,451 | ¥ 4,546 | ¥ 83
Number of impaired assets |  |  |  |  | 7 | 7 | 4 | 5 | 26 | 43 | 25 | 18 | 12 | 12 | 4 |  |  |  |
Write-downs of long-lived assets | $ 227 | ¥ 18,853 | ¥ 6,977 | ¥ 3,673 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of impaired assets held for use |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Number of impaired assets reclassified to held for use |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |

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- Definition Number of Impaired Assets + Details
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- Definition Number of Impaired Assets Reclassified to Held for Use + Details
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- Definition The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 45, 46, 47 + 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 aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 26 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 7, 25 + Details
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