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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Product Warranty and Legacy Product Corrective Action 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
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
Balance at January 1
 
$
235

 
$
191

 
$

 
$

 
$
235

 
$
191

Issuances/accruals during the period(1)
 
286

 
322

 
274

 

 
560

 
322

Settlements made during the period
 
(274
)
 
(272
)
 
(11
)
 

 
(285
)
 
(272
)
Foreign currency/Other changes
 
$
(8
)
 
$
(6
)
 
$
(9
)
 
$

 
$
(17
)
 
$
(6
)
Balance at December 31
 
$
239

 
$
235

 
$
254

 
$

 
$
493

 
$
235

Current portion
 
$
185

 
$
186

 
$
155

 
$

 
$
340

 
$
186

Non-current portion
 
54

 
49

 
99

 

 
153

 
49

Total
 
$
239

 
$
235

 
$
254

 
$

 
$
493

 
$
235


(1) $61 million is related to product warranty included within issuances/accruals during 2014 related to acquisitions.
Operating Lease Commitments
At December 31, 2015, we had noncancelable operating lease commitments totaling $929 million. The annual future minimum lease payments are summarized by year in the table below:
Millions of dollars
 
 
2016
 
$
218

2017
 
175

2018
 
142

2019
 
111

2020
 
87

Thereafter
 
196

Total noncancelable operating lease commitments
 
$
929

Purchase Obligations
Our expected cash outflows resulting from non-cancellable purchase obligations are summarized by year in the table below:
Millions of dollars
 
 
2016
 
$
248

2017
 
177

2018
 
149

2019
 
114

2020
 
112

Thereafter
 
186

Total purchase obligations
 
$
986