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Investment in SABMiller (Narrative) (Details) (SABMiller Plc [Member], USD $) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2013 Reported Value Measurement [Member] | Dec. 31, 2012 Reported Value Measurement [Member] | Dec. 31, 2013 Level 1 [Member] Estimate of Fair Value Measurement [Member] | Dec. 31, 2012 Level 1 [Member] Estimate of Fair Value Measurement [Member]
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity method investment, ownership percentage | 26.80% |  |  |  |
Gains included in Earnings From Equity Method Investment | $ 342,000,000 |  |  |  |
Fair value of investment in SABMiller |  | 6,500,000,000 | 6,600,000,000 | 22,100,000,000 | 19,800,000,000
Undistributed earnings from equity method investment | $ 2,700,000,000 |  |  |  |

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