Note 3 - Debt (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Note 3 - Debt (Details) [Line Items]
Debt Instrument, Fair Value Disclosure	$ 4,200	$ 4,200	$ 3,600
Long-term Debt and Capital Lease Obligations	3,910	3,910	$ 3,227
Proceeds from Issuance of Unsecured Debt		745
Senior Notes [Member]
Note 3 - Debt (Details) [Line Items]
Proceeds from Issuance of Unsecured Debt	745
1.50% Due May 8, 2018 [Member] \| Senior Notes [Member]
Note 3 - Debt (Details) [Line Items]
Debt Instrument, Face Amount	$ 375	$ 375
Debt Instrument, Interest Rate, Stated Percentage	1.50%	1.50%
2.90% Due May 15, 2022 [Member] \| Senior Notes [Member]
Note 3 - Debt (Details) [Line Items]
Debt Instrument, Face Amount	$ 375	$ 375
Debt Instrument, Interest Rate, Stated Percentage	2.90%	2.90%

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Face (par) amount of debt instrument at time of issuance.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 30

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

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-Glossary Financing Activities

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