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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases
Future minimum lease payments under non-cancellable operating leases as of December 31, 2016, follow:
 
 
 
 
 
 
 
 
 
 
 
 
After

 
 
(MILLIONS OF DOLLARS)
 
2017

 
2018

 
2019

 
2020

 
2021

 
2021

 
Total

Maturities
 
$
29

 
$
25

 
$
20

 
$
14

 
$
12

 
$
54

 
$
154