Income Taxes - Reconciliation of Income Taxes Based on U.S. Federal Statutory Rate (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Rate Rec: Percentages
Income taxes at the federal statutory rate	35.00%	34.00%	34.00%
Change in valuation allowance	(1.20%)	(6.10%)	0.00%
Foreign tax credits, exclusive of tax reform	(13.80%)	8.20%	2.70%
State taxes, net of federal taxes, exclusive of tax reform	9.10%	5.70%	3.60%
Non-U.S. earnings taxed at different rates	1.70%	4.80%	3.20%
Non-deductible mergers and acquisitions costs	0.00%	0.00%	(2.60%)
R&D Tax credit	0.30%	0.90%	1.30%
Change in uncertain tax positions	(0.40%)	3.20%	0.00%
Impact of Tax Reform
Toll Charge, net of foreign tax credit	(11.50%)	0.00%	0.00%
Remeasurement of deferred taxes pursuant to tax reform	65.60%	0.00%	0.00%
Tax Reform impact on divestiture of business segment	33.90%	0.00%	0.00%
Section 199/Domestic Production Deduction	0.80%	(0.00%)	(0.00%)
Divestiture of Business Segment, exclusive of tax reform	13.60%	0.00%	0.00%
Prior period revisions	0.50%	4.20%	1.80%
Foreign JV Net Income	0.00%	(4.10%)	(2.30%)
Other adjustments, net	0.70%	(0.80%)	(1.30%)
Total expense (benefit)	134.20%	50.00%	40.30%