Other Comprehensive Earnings/Losses (Changes in Each Component of Accumulated Other Comprehensive Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			$ 15,377
Other comprehensive earnings (losses) before reclassifications	$ 304	$ 522	223	$ 226
Deferred income taxes	(66)	(182)	(50)	(78)
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	238	340	173	148
Amounts reclassified to net earnings	50	54	98	108
Deferred income taxes	(13)	(20)	(26)	(42)
Amounts reclassified to net earnings, net of deferred income taxes	37	34	72	66
Other comprehensive earnings, net of deferred income taxes	275	374	245	214	$ 155
Ending balance	15,796		15,796		15,377
Benefit Plans [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(1,794)	(2,016)	(1,839)	(2,048)	(2,048)
Other comprehensive earnings (losses) before reclassifications	0	0	0	0
Deferred income taxes	0	0	0	0
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	0	0	0	0
Amounts reclassified to net earnings	57	52	118	106
Deferred income taxes	(15)	(19)	(31)	(41)
Amounts reclassified to net earnings, net of deferred income taxes	42	33	87	65
Other comprehensive earnings, net of deferred income taxes	42	33	87	65
Ending balance	(1,752)	(1,983)	(1,752)	(1,983)	(1,839)
AB InBev [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(129)	(192)	(54)	0	0
Other comprehensive earnings (losses) before reclassifications	306	521	225	225
Deferred income taxes	(66)	(182)	(50)	(78)
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	240	339	175	147
Amounts reclassified to net earnings	(7)	2	(20)	2
Deferred income taxes	2	(1)	5	(1)
Amounts reclassified to net earnings, net of deferred income taxes	(5)	1	(15)	1
Other comprehensive earnings, net of deferred income taxes	235	340	160	148
Ending balance	106	148	106	148	(54)
Currency Translation Adjustments and Other [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(4)	(4)	(4)	(4)	(4)
Other comprehensive earnings (losses) before reclassifications	(2)	1	(2)	1
Deferred income taxes	0	0	0	0
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	(2)	1	(2)	1
Amounts reclassified to net earnings	0	0	0	0
Deferred income taxes	0	0	0	0
Amounts reclassified to net earnings, net of deferred income taxes	0	0	0	0
Other comprehensive earnings, net of deferred income taxes	(2)	1	(2)	1
Ending balance	(6)	(3)	(6)	(3)	(4)
Accumulated Other Comprehensive Losses [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(1,927)	(2,212)	(1,897)	(2,052)	(2,052)
Other comprehensive earnings, net of deferred income taxes			245		155
Ending balance	$ (1,652)	$ (1,838)	$ (1,652)	$ (1,838)	$ (1,897)