Note 2 - Net Income per Share (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Numerator:
Net income	$ 490,503	$ 431,929	$ 1,249,775	$ 1,241,774
Denominator:
Weighted average common shares - basic	1,289,631	1,308,888	1,290,921	1,303,217
Dilutive effect of equity incentive plans	19,703	19,527	20,252	21,292
Weighted average common shares - diluted	1,309,334	1,328,415	1,311,173	1,324,509
Net income per share:
Basic	$ 0.38	$ 0.33	$ 0.97	$ 0.95
Diluted	$ 0.37	$ 0.33	$ 0.95	$ 0.94
Common stock equivalents excluded from income per diluted share because their effect would have been anti-dilutive	17,811	33,486	16,548	33,092