Other Comprehensive Earnings/Losses (Changes in Each Component of Accumulated Other Comprehensive Losses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of period	$ (1,378)	$ (2,040)	$ (2,040)
Other comprehensive earnings before reclassifications	51	(113)
Deferred income taxes	(18)	37
Other comprehensive earnings before reclassifications, net of deferred income taxes	33	(76)
Amounts reclassified to earnings	44	77
Deferred income taxes	(17)	(29)
Amounts reclassified to net earnings, net of deferred income taxes	27	48
Other comprehensive earnings (losses), net of deferred income taxes	60	(28)	662
Balances at end of period	(1,318)	(2,068)	(1,378)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of period	0	2	2
Other comprehensive earnings before reclassifications	0	0
Deferred income taxes	0	0
Other comprehensive earnings before reclassifications, net of deferred income taxes	0	0
Amounts reclassified to earnings	0	0
Deferred income taxes	0	0
Amounts reclassified to net earnings, net of deferred income taxes	0	0
Other comprehensive earnings (losses), net of deferred income taxes	0	0
Balances at end of period	0	2
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of period	(1,273)	(2,414)	(2,414)
Other comprehensive earnings before reclassifications	0	30
Deferred income taxes	0	(13)
Other comprehensive earnings before reclassifications, net of deferred income taxes	0	17
Amounts reclassified to earnings	41	79
Deferred income taxes	(16)	(30)
Amounts reclassified to net earnings, net of deferred income taxes	25	49
Other comprehensive earnings (losses), net of deferred income taxes	25	66
Balances at end of period	(1,248)	(2,348)
SABMiller Plc [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balances at beginning of period	(105)	372	372
Other comprehensive earnings before reclassifications	51	(143)
Deferred income taxes	(18)	50
Other comprehensive earnings before reclassifications, net of deferred income taxes	33	(93)
Amounts reclassified to earnings	3	(2)
Deferred income taxes	(1)	1
Amounts reclassified to net earnings, net of deferred income taxes	2	(1)
Other comprehensive earnings (losses), net of deferred income taxes	35	(94)
Balances at end of period	$ (70)	$ 278