Maturities of Available-For-Sale Debt Securities and Fund Trusts Included in Short-Term Investments and Investments (Detail) (JPY ¥) In Millions, unless otherwise specified	Dec. 31, 2011
Cost
Due within one year	¥ 20
Due after one year through five years	962
Due after five years through ten years	1,646
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Total	2,628
Fair value
Due within one year	20
Due after one year through five years	926
Due after five years through ten years	1,608
Available-for-sale Securities, Debt Securities, Total	¥ 2,554

This item represents debt securities, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are expected to mature after five years and through ten years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

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For an unclassified balance sheet, total of debt securities categorized neither as held-to-maturity nor trading.

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