Benefit Plans - Actual Overall Asset Allocation for U.S. And Non-U.S. Plans as Compared to Investment Policy Goals (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Target Allocation
Asset allocation	98.00%
U.S. Pension Plans | Fixed income
Plan Assets
Asset allocation	98.00%	97.00%
Target Allocation
Asset allocation	100.00%	100.00%
U.S. Pension Plans | Alternative
Plan Assets
Asset allocation	2.00%	3.00%
Target Allocation
Asset allocation	0.00%	0.00%
Non-US Pension Plans | Equity securities
Plan Assets
Asset allocation	40.00%	40.00%
Target Allocation
Asset allocation	46.00%	45.00%
Non-US Pension Plans | Fixed income
Plan Assets
Asset allocation	51.00%	53.00%
Target Allocation
Asset allocation	54.00%	55.00%
Non-US Pension Plans | Alternative
Plan Assets
Asset allocation	7.00%	5.00%
Target Allocation
Asset allocation	0.00%	0.00%
Non-US Pension Plans | Cash
Plan Assets
Asset allocation	2.00%	2.00%
Target Allocation
Asset allocation	0.00%	0.00%