Note 2 - Net Income per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Numerator:
Net income	$ 677	$ 570
Denominator:
Weighted average common shares - basic	1,295	1,288
Dilutive effect of equity incentive plans	24	20
Weighted average common shares - diluted	1,319	1,308
Earnings Per Share, Basic and Diluted [Abstract]
Basic	$ 0.52	$ 0.44
Diluted	$ 0.51	$ 0.44
Common stock equivalents excluded from income per diluted share because their effect would have been anti-dilutive	1	14

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