Weighted Average Assumptions Used To Determine Benefit Obligations (Detail)	Dec. 31, 2013	Dec. 31, 2012
Pension Costs
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	4.48%	4.16%
Rate of Compensation increase	3.33%	3.33%
Nonpension Postretirement Costs
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	4.56%	3.89%