XML 50 R30.htm IDEA: XBRL DOCUMENT v3.8.0.1
Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2017
Fair Value Disclosures [Abstract]  
Schedule Of Carrying Amounts And Estimated Fair Values
The carrying amounts and estimated fair values for the remaining financial instruments, excluding investments accounted for under the equity method, consisted of the following at December 31:
 
2017
 
2016
 
Carrying
Amount
 
Fair
Value
 
Carrying
Amount
 
Fair
Value
 
($ in millions)
 
 
 
 
 
 
 
 
Long-term investments
$
26

 
$
49

 
$
116

 
$
141

Long-term debt, including current maturities
(9,736
)
 
(11,771
)
 
(10,112
)
 
(11,626
)
Schedule Of Fair Value Of Long-term Assets And Liabilities
The following tables set forth the fair value of long-term investment and long-term debt balances disclosed above by valuation technique level, within the fair value hierarchy (there were no level 3 valued assets or liabilities).

 
 
 
Level 1
 
Level 2
 
Total
 
($ in millions)
December 31, 2017
 
 
 
 
 
  Long-term investments
$
4

 
$
45

 
$
49

  Long-term debt, including current maturities
(11,676
)
 
(95
)
 
(11,771
)
 
 
 
 
 
 
December 31, 2016
 
 
 
 
 
  Long-term investments
$
4

 
$
137

 
$
141

  Long-term debt, including current maturities
(11,427
)
 
(199
)
 
(11,626
)