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Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2012
Financial Instruments [Abstract]  
Estimated Fair Value Of Significant Financial Instruments
The fair value amounts shown below are not necessarily indicative of the amounts that the Company would realize upon disposition, nor do they indicate the Company’s intent or need to dispose of the financial instrument.

  
June 30, 2012
 
December 31, 2011
(In millions of dollars)
Carrying
Amount

 
Fair
Value

 
Carrying
Amount

 
Fair
Value

Cash and cash equivalents
$
1,504

 
$
1,504

 
$
2,113

 
$
2,113

Long-term investments
$
61

 
$
61

 
$
58

 
$
58

Short-term debt
$
259

 
$
265

 
$
260

 
$
261

Long-term debt
$
2,663

 
$
2,944

 
$
2,668

 
$
2,958