Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Statement of Financial Position [Abstract]
Accounts receivable - trade, allowance for doubtful accounts (in dollars)	$ 33	$ 25
Property, plant and equipment, accumulated depreciation (in dollars)	4,371	3,796
Accumulated amortization on intangible assets (in dollars)	$ 1,345	$ 1,064
3.625% convertible perpetual preferred stock, interest rate (as a percent)	3.625%	3.625%
Treasury stock, shares (in shares)	65,568,119	56,808,672