Employee Benefits - Weighted-Average Actuarial Assumption Used to Determine Expense (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.70%	4.10%	4.70%
Expected return on plan assets	7.30%	7.30%	7.30%
Rate of compensation increase	3.25%	3.25%	3.25%
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.18%	4.14%	4.71%
Expected return on plan assets	6.27%	6.26%	6.27%
Rate of compensation increase	2.66%	2.73%	2.88%