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Investment in AB InBev/SABMiller (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Oct. 09, 2016
Sep. 30, 2016
Schedule of Equity Method Investments [Line Items]            
Earnings from equity investment   $ 795 $ 757 $ 1,006    
Earnings (loss) before income taxes   21,852 8,078 7,774    
SABMiller Plc [Member]            
Schedule of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage (approximately)         27.00% 27.00%
Earnings from equity investment   $ 795 757 $ 1,006    
SABMiller Plc [Member] | Reported Value Measurement [Member]            
Schedule of Equity Method Investments [Line Items]            
Fair value of investment     5,500      
SABMiller Plc [Member] | Level 1 [Member] | Estimate of Fair Value Measurement [Member]            
Schedule of Equity Method Investments [Line Items]            
Fair value of investment     $ 25,800      
SABMiller Plc [Member] | The Coca-Cola Company and Gutsche Family Investments [Member]            
Schedule of Equity Method Investments [Line Items]            
Earnings from equity investment $ 309