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Investment in SABMiller (Summary of Balance Sheet of SABMiller) (Details) - SABMiller Plc [Member] - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]    
Current assets $ 4,266 $ 5,878
Long-term assets 38,425 43,812
Current liabilities 6,282 10,051
Long-term liabilities 13,960 14,731
Non-controlling interests $ 1,235 $ 1,241