Note 2 - Significant Accounting Policies and Methods of Application (Detail) - Contractual Maturities of Held-To-Maturity Investments (USD $) In Millions, unless otherwise specified	Mar. 31, 2012
Held-to-maturity investments	$ 2
Held-to-maturity investments	6
Held-to-maturity investments	0
Held-to-maturity investments	$ 8

Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the fifth through tenth fiscal year following the latest fiscal year.

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Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the next fiscal year through the fifth fiscal year following the latest fiscal year.

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- Definition

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