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, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of period	$ (3,327)	$ (2,945)	$ (3,280)	$ (2,682)	$ (2,682)
Other comprehensive earnings (losses) before reclassifications	(72)	37	(207)	(435)
Deferred income taxes	25	(13)	83	151
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	(47)	24	(124)	(284)
Amounts reclassified to net earnings	56	71	104	143
Deferred income taxes	(22)	(28)	(40)	(55)
Amounts reclassified to net earnings, net of deferred income taxes	34	43	64	88
Other comprehensive (losses) earnings, net of deferred income taxes	(13)	67	(60)	(196)	(598)
Balances at end of period	(3,340)	(2,878)	(3,340)	(2,878)	(3,280)
SABMiller Plc [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of period	(1,139)	(944)	(1,265)	(640)	(640)
Other comprehensive earnings (losses) before reclassifications	(72)	37	110	(434)
Deferred income taxes	25	(13)	(39)	151
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	(47)	24	71	(283)
Amounts reclassified to net earnings	7	5	19	9
Deferred income taxes	(3)	(1)	(7)	(2)
Amounts reclassified to net earnings, net of deferred income taxes	4	4	12	7
Other comprehensive (losses) earnings, net of deferred income taxes	(43)	28	83	(276)
Balances at end of period	(1,182)	(916)	(1,182)	(916)	(1,265)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of period	(4)	(3)	(5)	(2)	(2)
Other comprehensive earnings (losses) before reclassifications	0	0	1	(1)
Deferred income taxes	0	0	0	0
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	0	0	1	(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 (losses) earnings, net of deferred income taxes	0	0	1	(1)
Balances at end of period	(4)	(3)	(4)	(3)	(5)
Benefit Plans [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of period	(2,184)	(1,998)	(2,010)	(2,040)	(2,040)
Other comprehensive earnings (losses) before reclassifications	0	0	(318)	0
Deferred income taxes	0	0	122	0
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	0	0	(196)	0
Amounts reclassified to net earnings	49	66	85	134
Deferred income taxes	(19)	(27)	(33)	(53)
Amounts reclassified to net earnings, net of deferred income taxes	30	39	52	81
Other comprehensive (losses) earnings, net of deferred income taxes	30	39	(144)	81
Balances at end of period	$ (2,154)	$ (1,959)	$ (2,154)	$ (1,959)	$ (2,010)