Weighted Average Assumptions Used To Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Costs
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	4.15%	4.75%	5.34%
Rate of Compensation increase	3.33%	3.33%	3.68%
Expected long-term rate of return on plan assets	5.45%	5.35%	5.87%
Nonpension Postretirement Costs
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	3.92%	4.31%	5.28%