Accumulated Other Comprehensive Losses (Changes In Each Component Of Accumulated Other Comprehensive Losses) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accumulated Other Comprehensive Earnings Losses By Component [Line Items]
Balances at beginning of year	$ (1,887)	$ (1,484)	$ (1,561)
Period change, before income taxes	(268)	(648)	122
Deferred income taxes	115	245	(45)
Balances at end of year	(2,040)	(1,887)	(1,484)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Earnings Losses By Component [Line Items]
Balances at beginning of year	2	4	3
Period change, before income taxes	0	(2)	1
Deferred income taxes	0	0	0
Balances at end of year	2	2	4
Changes In Net Loss And Prior Service Cost [Member]
Accumulated Other Comprehensive Earnings Losses By Component [Line Items]
Balances at beginning of year	(2,062)	(1,811)	(1,846)
Period change, before income taxes	(574)	(415)	58
Deferred income taxes	222	164	(23)
Balances at end of year	(2,414)	(2,062)	(1,811)
Ownership Share Of SABMiller's Other Comprehensive Earnings (Losses) [Member]
Accumulated Other Comprehensive Earnings Losses By Component [Line Items]
Balances at beginning of year	173	323	282
Period change, before income taxes	306	(231)	63
Deferred income taxes	(107)	81	(22)
Balances at end of year	$ 372	$ 173	$ 323