Other Comprehensive Earnings/Losses (Deferred Income Tax Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Accumulated Other Comprehensive Earnings Losses By Component [Line Items]
Deferred income tax expense (benefit)	$ 10	$ 64	$ 122	$ 117
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)	26	21	41	42
SABMiller [Member]
Accumulated Other Comprehensive Earnings Losses By Component [Line Items]
Deferred income tax expense (benefit)	$ (16)	$ 43	$ 81	$ 75