Note 7 - Stock-Based Compensation (Detail) - Compensation Costs and Income Tax Benefits (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Compensation costs (1)	$ 9	[1]	$ 14	[1]	$ 11	[1]
Income tax benefits (1)	1	[1]	1	[1]	2	[1]
Excess tax benefits (2)	$ 1	[2]	$ 1	[2]	$ 2	[2]

[1] Recorded in our Consolidated Statements of Income.

[2] Recorded in our Consolidated Statements of Cash Flows.