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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]  
Product Warranty Reserves
The following table summarizes the changes in total product warranty and legacy product warranty liability reserves for the periods presented:


Product Warranty

Legacy Product Warranty

Total
Millions of dollars

2017

2016

2017

2016

2017

2016
Balance at January 1

$
251


$
239


$
69


$
254


$
320


$
493

Issuances/accruals during the period

87


76


—


—


87


76

Settlements made during the period/other

(89
)

(67
)

(26
)

(37
)

(115
)

(104
)
Balance at March 31

$
249


$
248


$
43


$
217


$
292


$
465




















Current portion

$
184


$
191


$
43


$
167


$
227


$
358

Non-current portion

65


57


—


50


65


107

Total

$
249


$
248


$
43


$
217


$
292


$
465