Operating leases (Tables)

12 Months Ended

Dec. 31, 2012

Leases [Abstract]

Minimum payments for operating leases having initial or remaining non-cancelable terms in excess of one year

Minimum payments for operating leases having initial or remaining non-cancelable terms in excess of one year are:

Years ended December 31,
(Millions of dollars)
2013		2014		2015		2016		2017		Thereafter		Total
$	254	$	193	$	139	$	104	$	74	$	239	$	1,003