Pensions and Other Employee Benefits - Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
U.S. based Pension Plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Assumptions used to determine net periodic benefit cost, Weighted average discount rate	5.10%	5.60%	6.30%
Canadian based Pension Plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Assumptions used to determine net periodic benefit cost, Weighted average discount rate	4.40%	5.40%	6.10%
Assumptions used to determine net periodic benefit cost, Weighted average expected long-term return on plan assets	7.50%	7.50%	7.50%
Assumptions used to determine net periodic benefit cost, Rate of compensation increase	4.00%	4.50%	4.50%
German Based Pension Plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Assumptions used to determine net periodic benefit cost, Weighted average discount rate	5.10%	5.40%	5.80%
Canadian based plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Assumptions used to determine net periodic benefit cost, Weighted average discount rate	4.30%	5.40%	6.10%
Assumptions used to determine net periodic benefit cost, Weighted average expected long-term return on plan assets	8.25%	8.25%	8.25%
Assumptions used to determine net periodic benefit cost, Rate of compensation increase	4.50%	4.50%	4.50%
U.S.Based plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Assumptions used to determine net periodic benefit cost, Weighted average discount rate	4.80%	5.40%	5.90%