XML 21 R5.htm IDEA: XBRL DOCUMENT v3.4.0.3
Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 18 $ 20
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 400,000,000 400,000,000
Common stock, shares outstanding 145,992,724 146,746,537
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 50,000,000 50,000,000
Preferred stock, shares outstanding 0 0