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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]  
Product Warranty Reserves
The following table summarizes the changes in total product warranty reserves for the periods presented:
Millions of dollars

2014

2013
Balance at January 1

$
191


$
187

Issuances/accruals during the period

134


149

Settlements made during the period

(143
)

(151
)
Balance at June 30

$
182


$
185

Current portion

$
143


$
143

Non-current portion

39


42

Total

$
182


$
185