Other Comprehensive Earnings/Losses (Changes in Each Component of Accumulated Other Comprehensive Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of year	$ (2,682)	$ (1,378)	$ (2,040)
Other comprehensive losses before reclassifications	(1,210)	(2,294)	817
Deferred income taxes	431	858	(350)
Other comprehensive losses before reclassifications, net of deferred income taxes	(779)	(1,436)	467
Amounts reclassified to net earnings	293	213	317
Deferred income taxes	(112)	(81)	(122)
Amounts reclassified to net earnings, net of deferred income taxes	181	132	195
Other comprehensive (losses) earnings, net of deferred income taxes	(598)	(1,304)	662
Balances at end of year	(3,280)	(2,682)	(1,378)
SABMiller Plc [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of year	(640)	(105)	372
Other comprehensive losses before reclassifications	(983)	(881)	(740)
Deferred income taxes	344	308	259
Other comprehensive losses before reclassifications, net of deferred income taxes	(639)	(573)	(481)
Amounts reclassified to net earnings	21	59	6
Deferred income taxes	(7)	(21)	(2)
Amounts reclassified to net earnings, net of deferred income taxes	14	38	4
Other comprehensive (losses) earnings, net of deferred income taxes	(625)	(535)	(477)
Balances at end of year	(1,265)	(640)	(105)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of year	(2)	0	2
Other comprehensive losses before reclassifications	(4)	(2)	(2)
Deferred income taxes	1	0	0
Other comprehensive losses before reclassifications, net of deferred income taxes	(3)	(2)	(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	(3)	(2)	(2)
Balances at end of year	(5)	(2)	0
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of year	(2,040)	(1,273)	(2,414)
Other comprehensive losses before reclassifications	(223)	(1,411)	1,559
Deferred income taxes	86	550	(609)
Other comprehensive losses before reclassifications, net of deferred income taxes	(137)	(861)	950
Amounts reclassified to net earnings	272	154	311
Deferred income taxes	(105)	(60)	(120)
Amounts reclassified to net earnings, net of deferred income taxes	167	94	191
Other comprehensive (losses) earnings, net of deferred income taxes	30	(767)	1,141
Balances at end of year	$ (2,010)	$ (2,040)	$ (1,273)