Background and Basis of Presentation (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended	1 Months Ended		3 Months Ended	18 Months Ended	1 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Oct. 31, 2012 October 2011 share repurchae program [Member]	Oct. 31, 2011 October 2011 share repurchae program [Member]	Mar. 31, 2013 October 2011 share repurchae program [Member]	Mar. 31, 2013 October 2011 share repurchae program [Member]	Aug. 31, 2013 April 2013 share repurchae program [Member]	Apr. 30, 2013 April 2013 share repurchae program [Member]	Sep. 30, 2013 April 2013 share repurchae program [Member]	Sep. 30, 2013 April 2013 share repurchae program [Member]	Sep. 30, 2013 SABMiller [Member]	Sep. 30, 2013 Common Stock [Member] Dividend Declared [Member]
Dividends Payable [Line Items]
Increase in rate of dividend															9.10%
Quarterly dividends declared (usd per share)	$ 0.48	$ 0.44	$ 1.36	$ 1.26	$ 1.70
Current annualized dividend (usd per share)			$ 1.92
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage														26.80%
Equity, Class of Treasury Stock [Line Items]
Planned share repurchase program						$ 1,500,000,000	$ 1,000,000,000			$ 1,000,000,000	$ 300,000,000
Shares repurchased during period			9,900,000	19,600,000.0				1,700,000	48,300,000			4,500,000	8,200,000
Shares repurchased during period, value			348,000,000	622,000,000	1,116,000,000			57,000,000				156,000,000	291,000,000
Average price of repurchased shares, per share			$ 35.20	$ 31.76				$ 34.05	$ 31.06			$ 34.75	$ 35.44
Amount remaining in the repurchase program												$ 709,000,000