Investment Securities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Apr. 03, 2011
Proceeds in connection with the redemption of certain auction rate securities (ARS) [Member]
Investment Securities (Textual) [Abstract]
Proceeds from the redemption or sale of certain ARS	$ 9.3
Proceeds related to the exercise of the ARS Rights [Member]
Investment Securities (Textual) [Abstract]
Proceeds from the redemption or sale of certain ARS	$ 14.5

The cash inflow associated with the sale of securities classified as trading securities and held for investment purposes. Excludes proceeds from trading securities purchased and held principally for the purpose of selling them in the near term (thus held for only a short period of time).

No definition available.

Name:	us-gaap_ProceedsFromSaleOfTradingSecuritiesHeldforinvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration