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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 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Debt Disclosure [Abstract]        
Loss on the early extinguishment of debt $ 0 $ 0 $ 0 $ 27
Write off of Deferred Debt Issuance Cost       $ 3