Fair Value Of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Of Financial Instruments [Abstract]

Carrying And Fair Values Of Our Other Financial Assets And Liabilities

Financial assets (liabilities) (a)	Carrying Value		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs   (Level 2) (b)
	December 31, 2010
Marketable securities:
Available-for-sale	$	47	$	47	$	47	$	–
Held-to-maturity		165		165		–		165
Other investments		113		113		55		58
Derivatives		130		130		–		130
Long-term debt, including current portion		(3,203)		(3,436)		–		(3,436)
	December 31, 2011
Marketable securities:
Available-for-sale	$	70	$	70	$	70	$	–
Held-to-maturity		178		175		–		175
Other investments		145		145		89		56
Derivatives		34		34		–		34
Long-term debt, including current portion		(3,930)		(4,199)		–		(4,199)

(a) We had no Level 3 financial instruments on December 31, 2010 or 2011.

(b) Determined under a market approach using valuation models that incorporate observable inputs such as interest rates, bond yields and quoted prices for similar assets and liabilities.