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Leases
12 Months Ended
Dec. 31, 2013
Leases [Abstract]  
Leases
LEASES
 
We lease our offices and other property through operating leases.  Rental expense is charged to operations as incurred.  For 2013, 2012 and 2011, total rental expense for operating leases was $17 million, $16 million and $15 million, respectively.  At December 31, 2013, minimum payments for operating leases having initial or remaining non-cancelable terms in excess of one year were as follows: 
(Millions of dollars)
 
2014
$
15

2015
14

2016
12

2017
12

2018
11

Thereafter
29

Total
$
93