Note 16 - Share-based Compensation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Note 16 - Share-based Compensation (Details) [Line Items]
Share-based Compensation	$ 10us-gaap_ShareBasedCompensation	$ 15us-gaap_ShareBasedCompensation
Maximum Term for Non-Qualified and Incentive Stock Options	10 years
Proceeds from Stock Options Exercised	89	50
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	40	32
Years of Historical Volatility Included in Most Recent Volatility	15 years
Employee Stock Option [Member]
Note 16 - Share-based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	8
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 328 days
Allocated Share-based Compensation Expense	4	6
Proceeds from Stock Options Exercised	89	50
Restricted Stock [Member] \| Minimum [Member]
Note 16 - Share-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	1 year
Restricted Stock [Member] \| Maximum [Member]
Note 16 - Share-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	10 years
Restricted Stock [Member]
Note 16 - Share-based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	41
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 255 days
Allocated Share-based Compensation Expense	$ 6	$ 9
Minimum [Member]
Note 16 - Share-based Compensation (Details) [Line Items]
Stock Options Exercisable Period from Date of Grant	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	7 years 73 days	7 years 73 days
Maximum [Member]
Note 16 - Share-based Compensation (Details) [Line Items]
Stock Options Exercisable Period from Date of Grant	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	7 years 73 days	7 years 73 days

Maximum term in years for non-qualified and incentive stock options

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Represents the exercisable period of stock options from the date of grant.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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