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Investment in SABMiller (Equity Method Investments) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]      
Earnings from equity investment in SABMiller $ 991 $ 1,224 $ 730
SABMiller Plc [Member]
     
Schedule of Equity Method Investments [Line Items]      
Equity earnings 906 1,181 703
Gains resulting from issuances of common stock by SABMiller 85 43 27
Earnings from equity investment in SABMiller $ 991 $ 1,224 $ 730