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Investment in SABMiller (AB InBev and SABMiller Business Combination) (Details) £ / shares in Units, £ in Millions, $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Nov. 11, 2015 USD ($) shares | Dec. 31, 2015 USD ($) | Nov. 11, 2015 GBP (£) £ / shares | Nov. 11, 2015 USD ($)
Foreign Exchange Option [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Notional amount of option |  |  | £ 1,625 | $ 2,467
Derivative gain |  | $ 20 |  |
Derivative fair value |  | $ 152 |  |
SABMiller Plc [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Equity method investment, ownership percentage (approximately) |  |  | 27.00% | 27.00%
AB InBev and SABMiller [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Consideration to be transferred by AB InBev (approximately) | $ 107,000 |  |  |
British pounds in cash for each SABMiller share, offered by AB InBev (GBP per share) | £ / shares |  |  | £ 44 |
Partial share alternative percentage available for SABMiller shares (approximately) |  |  | 41.00% | 41.00%
Partial share alternative, British pounds in cash for each SABMiller share, offered by AB InBev (GBP per share) | £ / shares |  |  | £ 3.7788 |
Expected pre-tax cash received (subject to proration) |  |  |  | $ 2,500
Pre-tax accounting gain (approximately) | 12,000 |  |  |
After-tax accounting gain (approximately) | $ 8,000 |  |  |
AB InBev and SABMiller [Member] | Restricted Shares [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Partial share alternative, new shares receivable per previously owned share (in shares) | shares | 0.483969 |  |  |
Expected economic and voting interests acquired (approximate) |  |  | 10.50% | 10.50%
Restrictive share lock-up period | 5 years |  |  |
Maximum shares that may issued under partial share alternative (in shares) | shares | 326,000,000 |  |  |

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