Note 2 - Significant Accounting Policies and Methods of Application (Detail) - Investments in Debt and Equity Securities (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Marketable Securities	$ 87	$ 72	$ 0
Money Market Funds [Member]
Marketable Securities	76	59	0
Corporate Bond Securities [Member]
Marketable Securities	5	6	0
Other Investments [Member]
Marketable Securities	6	7	0
Cash and Cash Equivalents [Member]
Marketable Securities	17	9	0
Short-term Investments [Member]
Marketable Securities	61	53	0
Other Long-Term Assets and Other Deferred Debits [Member]
Marketable Securities	$ 9	$ 10	$ 0