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Fair Value Of Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2013
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, 2012, and June 30, 2013, 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, 2012
Other investments
$
150

 
$
150

 
$
96

 
$
54

Derivatives
22

 
22

 
—

 
22

Long-term debt,
     including current portion
(3,909
)
 
(3,966
)
 
—

 
(3,966
)
 
 
 
 
 
 
 
 
 
June 30, 2013
Other investments
$
149

 
$
149

 
$
100

 
$
49

Derivatives
1

 
1

 
—

 
1

Long-term debt,
     including current portion
(3,908
)
 
(3,775
)
 
—

 
(3,775
)
(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, 2012, or June 30, 2013.