Pension plans (Tables)

12 Months Ended

Dec. 31, 2012

Compensation and Retirement Disclosure [Abstract]

Schedule of expected future benefit payments

Expected future payments are as follows:

For the year ending December 31
(in millions of U.S dollars)
2013	$	21
2014	21
2015	23
2016	24
2017	22
2018-2022	127