Weighted Average Assumptions used to Determine Net Periodic Benefit Obligations and Net Periodic Benefit Cost (Detail)	Dec. 31, 2013	Dec. 31, 2012
Domestic Plans
Weighted average assumptions used to determine net periodic benefit obligations at December 31:
Discount rate	4.80%	4.00%
Rate of compensation increase
TCN Plan
Weighted average assumptions used to determine net periodic benefit obligations at December 31:
Discount rate	4.80%	4.00%
Rate of compensation increase