Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Maximum Potential Amount of Future Fundings as the Primary Obligor for Guarantees and the Liability for Expected Future Fundings
We show the maximum potential amount of our future guarantee fundings and the carrying amount of our liability for guarantees for which we are the primary obligor at March 31, 2015 in the following table:
($ in millions)
Guarantee Type
Maximum Potential
Amount of Future Fundings
 
Liability for Guarantees
Debt service
$
49

 
$
14

Operating profit
78

 
42

Other
13

 
1

Total guarantees where we are the primary obligor
$
140

 
$
57