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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) (USD $)
In Millions
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY  
Unrealized gains on available-for-sale securities, income taxes$ 1$ 1
Change in unfunded pension liability, income taxes00
Stock issued under share-based payment plans, excess tax benefit$ 0$ 0