Other Comprehensive Earnings/Losses (Deferred Income Tax Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Accumulated Other Comprehensive Earnings Losses By Component [Line Items]
Deferred income tax expense (benefit)	$ 41	$ (93)	$ 163	$ 24
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Earnings Losses By Component [Line Items]
Deferred income tax expense (benefit)	0	0	0	0
Benefit Plans [Member]
Accumulated Other Comprehensive Earnings Losses By Component [Line Items]
Deferred income tax expense (benefit)	23	21	64	63
SABMiller [Member]
Accumulated Other Comprehensive Earnings Losses By Component [Line Items]
Deferred income tax expense (benefit)	$ 18	$ (114)	$ 99	$ (39)