Earnings From Equity Investment In SABMiller (Equity Method Investments) (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
Earnings (Losses) of Noncontrolling Interest and Equity Method Investments [Abstract]
Equity earnings	$ 216	$ 201	$ 942	$ 534
Gains resulting from issuances of common stock by SABMiller	14	7	31	18
Earnings from equity investment in SABMiller	$ 230	$ 208	$ 973	$ 552

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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