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Other Comprehensive Earnings/Losses (Reclassifications) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Pre-tax amounts reclassified from accumulated other comprehensive losses to net earnings | $ 29 | $ 51 | $ 127 | $ 159
AB InBev [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Pre-tax amounts reclassified from accumulated other comprehensive losses to net earnings | (21) | 3 | (41) | 5
Net loss [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Pre-tax amounts reclassified from accumulated other comprehensive losses to net earnings | 59 | 56 | 196 | 179
Prior service cost/credit [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Pre-tax amounts reclassified from accumulated other comprehensive losses to net earnings | (9) | (8) | (28) | (25)
Benefit Plans [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Pre-tax amounts reclassified from accumulated other comprehensive losses to net earnings | $ 50 | $ 48 | $ 168 | $ 154

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