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Investment in SABMiller (Summary of Balance Sheet of SABMiller) (Details) (SABMiller Plc [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
SABMiller Plc [Member]
   
Schedule of Equity Method Investments [Line Items]    
Current assets $ 5,833 $ 5,742
Long-term assets 48,460 51,733
Current liabilities 8,177 8,944
Long-term liabilities 20,315 22,000
Non-controlling interests $ 1,202 $ 1,105