Note 6 - Investments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 Short-term Investments [Member]	Dec. 31, 2011 Short-term Investments [Member]	Dec. 31, 2012 Long-Term Investment [Member]	Dec. 31, 2011 Long-Term Investment [Member]	Dec. 31, 2012 Equity Securities [Member] Short-term Investments [Member]	Dec. 31, 2011 Equity Securities [Member] Short-term Investments [Member]	Dec. 31, 2012 US Treasury and Government [Member] Short-term Investments [Member]	Dec. 31, 2011 US Treasury and Government [Member] Short-term Investments [Member]	Dec. 31, 2012 US Treasury and Government [Member] Long-Term Investment [Member]	Dec. 31, 2011 US Treasury and Government [Member] Long-Term Investment [Member]	Dec. 31, 2012 Corporate Debt Securities [Member] Short-term Investments [Member]	Dec. 31, 2011 Corporate Debt Securities [Member] Short-term Investments [Member]	Dec. 31, 2012 Corporate Debt Securities [Member] Long-Term Investment [Member]	Dec. 31, 2011 Corporate Debt Securities [Member] Long-Term Investment [Member]	Dec. 31, 2012 Cash [Member] Short-term Investments [Member]	Dec. 31, 2011 Cash [Member] Short-term Investments [Member]	Dec. 31, 2011 Cash [Member] Long-Term Investment [Member]	Dec. 31, 2012 Time Deposits and Other [Member] Short-term Investments [Member]	Dec. 31, 2011 Time Deposits and Other [Member] Short-term Investments [Member]
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Gross Amortized Cost		$ 1,958	$ 599	$ 2,656	$ 2,309	$ 8	$ 8	$ 20	$ 42	$ 41	$ 70	$ 1,150	$ 448	$ 2,615	$ 2,238	$ 15	$ 19	$ 1	$ 765	$ 82
Gross Unrealized Gains		633	639	55	7	630	638	0	0	1	1	3	1	54	6	0	0	0	0	0
Gross Unrealized Losses		0	0	0	(58)	0	0	0	0	0	0	0	0	0	(58)	0	0	0	0	0
Estimated Fair Value	5,302	2,591	1,238	2,711	2,258	638	646	20	42	42	71	1,153	449	2,669	2,186	15	19	1	765	82
Maximum maturity of fixed income portfolio (years)	6
Weighted average remaining duration (months)	18
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
One year or less (including restricted cash of $15)	2,591
One year through two years	1,016
Two years through three years	493
Three years through four years	766
Four years through five years	420
After five years through six years	$ 16