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Fair Value of Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2014
Fair Value Disclosures [Abstract]  
Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities
We show the carrying values and the fair values of noncurrent financial assets and liabilities that qualify as financial instruments, determined under current guidance for disclosures on the fair value of financial instruments, in the following table:
 
At June 30, 2014
 
At December 31, 2013
($ in millions)
Carrying
Amount
 
Fair Value
 
Carrying
Amount
 
Fair Value
Senior, mezzanine, and other loans
$
220

 
$
221

 
$
142

 
$
145

Marketable securities and other debt securities
114

 
114

 
111

 
111

Total long-term financial assets
$
334

 
$
335

 
$
253

 
$
256

 
 
 
 
 
 
 
 
Senior Notes
$
(2,187
)
 
$
(2,319
)
 
$
(2,185
)
 
$
(2,302
)
Commercial paper
(1,086
)
 
(1,086
)
 
(834
)
 
(834
)
Other long-term debt
(119
)
 
(122
)
 
(123
)
 
(124
)
Other long-term liabilities
(57
)
 
(57
)
 
(50
)
 
(50
)
Total long-term financial liabilities
$
(3,449
)
 
$
(3,584
)
 
$
(3,192
)
 
$
(3,310
)