This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

+ References+ Details

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments accounted for under the equity method of accounting as of the balance sheet date.

+ References+ Details

- 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

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-Glossary Impairment

-URI http://asc.fasb.org/extlink&oid=6515133

+ Details

- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References+ Details

Fair Value Measurements - Additional Information (Detail) In Millions, unless otherwise specified	12 Months Ended	1 Months Ended		12 Months Ended		12 Months Ended
	Mar. 31, 2012 JPY (¥)	Jan. 19, 2012 S-LCD JPY (¥)	Jan. 19, 2012 S-LCD KRW	Mar. 31, 2012 S-LCD JPY (¥)	Mar. 31, 2012 Level 3 S-LCD JPY (¥)	Mar. 31, 2012 Fair Value, Measurements, Nonrecurring Level 3 JPY (¥)	Mar. 31, 2011 Fair Value, Measurements, Nonrecurring Level 3 JPY (¥)
Fair Value of Financial Instruments [Line Items]
Transfers into level 1	¥ 2,169
Transfers out of level 1	7,221
Impairment losses related to long lived assets						59,583	23,735
Carrying values of long lived assets before impairments						67,875	27,513
Fair values of long-lived assets after impairments						8,292	3,778
Other-than-temporary impairment loss				60,019
Equity method investments, fair value					71,662
Proceeds from sales of equity method investments		¥ 71,986	1,070,000