Pension and Other Postretirement Benefits - Schedule of Weighted Average Assumptions Used to Determine Benefit Obligations (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation And Retirement Disclosure [Abstract]
Discount rate	4.80%	4.15%
Rate of compensation increase	3.50%	3.50%	3.50%
Discount rate	4.15%	4.90%	5.75%
Expected long-term rate of return on plan assets	8.50%	8.50%	8.50%
Rate of compensation increase	3.50%	3.50%	3.50%