Quarterly report pursuant to Section 13 or 15(d)

Disclosure Of Fair Value Of Financial Instruments (Details)

v2.3.0.15
Disclosure Of Fair Value Of Financial Instruments (Details) (USD $)
In Billions
Sep. 30, 2011
Dec. 31, 2010
Disclosure Of Fair Value Of Financial Instruments [Abstract]    
Fair value of company's long-term debt $ 2.0 $ 2.2
Book value of company's long-term debt $ 1.9 $ 2.1