Note 4 - Fair Value Measurements (Detail) - Money Market Funds (Fair Value, Inputs, Level 1 [Member], USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011		Sep. 30, 2011
Fair Value, Inputs, Level 1 [Member]
Money market funds (1)	$ 69	[1]	$ 59	[1]	$ 0	[1]

[1] Recorded at fair value and classified as Level1 within the fair value hierarchy.