Short-Term Borrowings and Long-Term Debt (Schedule of Assets Pledged Against Liabilities) (Details) (JPY ¥) In Millions	Mar. 31, 2011	Mar. 31, 2010
Short-Term Borrowings and Long-Term Debt
Short-term borrowings	¥ 4,710	¥ 20,751
Current portion of long-term debt	7,345	14,137
Long-term debt	9,977	10,079
Total	¥ 22,032	¥ 44,967

Carrying value as of the balance sheet date of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer), excluding the current portion, if any. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Name:	us-gaap_SecuredLongTermDebt
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant