Other Comprehensive Earnings/Losses (Changes in Each Component of Accumulated Other Comprehensive Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 2,880
Other comprehensive earnings (losses) before reclassifications	541	$ (1,210)	$ (2,294)
Deferred income taxes	(180)	431	858
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	361	(779)	(1,436)
Amounts reclassified to net earnings	1,338	293	213
Deferred income taxes	(471)	(112)	(81)
Amounts reclassified to net earnings, net of deferred income taxes	867	181	132
Other comprehensive (losses) earnings, net of deferred income taxes	1,228	(598)	(1,304)
Ending balance	12,770	2,880
Accumulated other comprehensive losses	2,052	3,280
AB InBev and SABMiller [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive losses	414
Currency translations	97
SABMiller Plc [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive losses	737
SABMiller Plc [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive earnings (losses) before reclassifications	787	(983)	(881)
Deferred income taxes	(276)	344	308
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	511	(639)	(573)
Amounts reclassified to net earnings	1,160	21	59
Deferred income taxes	(406)	(7)	(21)
Amounts reclassified to net earnings, net of deferred income taxes	754	14	38
Other comprehensive (losses) earnings, net of deferred income taxes	1,265	(625)	(535)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(5)	(2)	0
Other comprehensive earnings (losses) before reclassifications	1	(4)	(2)
Deferred income taxes	0	1	0
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	1	(3)	(2)
Amounts reclassified to net earnings	0	0	0
Deferred income taxes	0	0	0
Amounts reclassified to net earnings, net of deferred income taxes	0	0	0
Other comprehensive (losses) earnings, net of deferred income taxes	1	(3)	(2)
Ending balance	(4)	(5)	(2)
Benefit Plans [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(2,010)	(2,040)	(1,273)
Other comprehensive earnings (losses) before reclassifications	(247)	(223)	(1,411)
Deferred income taxes	96	86	550
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	(151)	(137)	(861)
Amounts reclassified to net earnings	178	272	154
Deferred income taxes	(65)	(105)	(60)
Amounts reclassified to net earnings, net of deferred income taxes	113	167	94
Other comprehensive (losses) earnings, net of deferred income taxes	(38)	30	(767)
Ending balance	(2,048)	(2,010)	(2,040)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(3,280)	(2,682)	(1,378)
Other comprehensive (losses) earnings, net of deferred income taxes	1,228	(598)	(1,304)
Ending balance	(2,052)	(3,280)	(2,682)
AOCI Attributable to Parent [Member] | SABMiller Plc [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(1,265)	(640)	(105)
Ending balance	$ 0	$ (1,265)	$ (640)