Other Comprehensive Earnings/Losses (Changes in Each Component of Accumulated Other Comprehensive Losses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances at beginning of period	$ (2,330)	$ (1,674)	$ (2,040)	$ (1,887)	$ (1,887)
Other comprehensive earnings before reclassifications	92	43	(498)	280
Deferred income taxes	(32)	(15)	171	(98)
Other comprehensive earnings before reclassifications, net of deferred income taxes	60	28	(327)	182
Amounts reclassified to earnings	75	68	232	166
Deferred income taxes	(28)	(26)	(88)	(65)
Amounts reclassified to net earnings, net of deferred income taxes	47	42	144	101
Other comprehensive (losses) earnings, net of deferred income taxes	107	70	(183)	283	(153)
Balances at end of period	(2,223)	(1,604)	(2,223)	(1,604)	(2,040)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances at beginning of period	1	2	2	2	2
Other comprehensive earnings before reclassifications	0	0	(1)	0
Deferred income taxes	0	0	0	0
Other comprehensive earnings before reclassifications, net of deferred income taxes	0	0	(1)	0
Amounts reclassified to 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)	0
Balances at end of period	1	2	1	2
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances at beginning of period	(2,301)	(2,001)	(2,414)	(2,062)	(2,062)
Other comprehensive earnings before reclassifications	0	0	30	0
Deferred income taxes	0	0	(13)	0
Other comprehensive earnings before reclassifications, net of deferred income taxes	0	0	17	0
Amounts reclassified to earnings	74	60	230	162
Deferred income taxes	(28)	(23)	(88)	(64)
Amounts reclassified to net earnings, net of deferred income taxes	46	37	142	98
Other comprehensive (losses) earnings, net of deferred income taxes	46	37	159	98
Balances at end of period	(2,255)	(1,964)	(2,255)	(1,964)
SABMiller [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances at beginning of period	(30)	325	372	173	173
Other comprehensive earnings before reclassifications	92	43	(527)	280
Deferred income taxes	(32)	(15)	184	(98)
Other comprehensive earnings before reclassifications, net of deferred income taxes	60	28	(343)	182
Amounts reclassified to earnings	1	8	2	4
Deferred income taxes	0	(3)	0	(1)
Amounts reclassified to net earnings, net of deferred income taxes	1	5	2	3
Other comprehensive (losses) earnings, net of deferred income taxes	61	33	(341)	185
Balances at end of period	$ 31	$ 358	$ 31	$ 358