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Consolidated Balance Sheet (Parenthetical) (USD $)
In Millions, except Per Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Stockholders' equity:    
Common Stock, Shares Authorized 960us-gaap_CommonStockSharesAuthorized 960us-gaap_CommonStockSharesAuthorized
Common Stock, Par or Stated Value Per Share $ 1us-gaap_CommonStockParOrStatedValuePerShare $ 1us-gaap_CommonStockParOrStatedValuePerShare
Common Stock, Shares Issued 782us-gaap_CommonStockSharesIssued 718us-gaap_CommonStockSharesIssued
Treasury Stock, Shares 35us-gaap_TreasuryStockShares 35us-gaap_TreasuryStockShares