Fair Value Of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Carrying And Fair Values Of Other Financial Assets And Liabilities

The following tables present the fair values of our other financial assets and liabilities on December 31, 2011 and 2012, and the basis for determining their fair values:

	Carrying Value			Fair Value			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2) (a)
Financial assets (liabilities) (b)	December 31, 2011
Marketable securities:
Available-for-sale	$	70		$	70		$	8	$	62
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		)
	December 31, 2012
Marketable securities:
Available-for-sale	$	—		$	—		$	—	$	—
Held-to-maturity (c)	—			—			—		—
Other investments	150			150			96		54
Derivatives	22			22			—		22
Long-term debt,      including current portion	(3,909		)	(3,966		)	—		(3,966		)

(a)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.

(b)We had no Level 3 financial instruments on December 31, 2011 or 2012.

(c)We sold $211 of held-to-maturity securities in 2012. The net carrying amount of these securities on the date of sale was $210.