Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Allowances for discounts and doubtful accounts on receivables	$ 31	$ 34
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized	750,000,000	750,000,000
Common Stock, shares issued	187,600,000	186,200,000
Treasury Stock, shares	3,000,000	500,000