CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowances (in dollars)	$ 234	$ 300
Common stock, par value (in dollars per share)	$ 0.000001	$ 0.000001
Common stock, shares authorized	2,400,000,000	2,400,000,000
Common stock, shares issued	1,114,117,148	1,133,391,371