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Note 8. Short And Long-Term Debt Loss on the Early Extinguishment of Debt and Write-Off of Deferred Financing Costs (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Debt Disclosure [Abstract]              
Loss on the early extinguishment of debt $ 48 $ 20 $ 17 $ 10 $ 48 $ 47 $ 68
Write off of Deferred Debt Issuance Cost           $ 3 $ 2