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Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]  
Product Warranty Reserves
The following table summarizes the changes in total product warranty reserves for the periods presented:
 
 
Nine Months Ended September 30,
Millions of dollars

2015

2014
Balance at January 1

$
235


$
191

Issuances/accruals during the period

474


194

Settlements made during the period

(203
)

(206
)
Balance at September 30

$
506


$
179

 
 
 
 
 
Current portion

$
326


$
141

Non-current portion

180


38

Total

$
506


$
179