Employee Benefits - Percentage of Assets Invested (Detail) - Pension Plan [Member]	Dec. 31, 2018	Dec. 31, 2017
U.S Plans [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	1.00%	1.00%
U.S Plans [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	25.00%	28.00%
U.S Plans [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	74.00%	71.00%
U.S Plans [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	0.00%	0.00%
U.S Plans [Member] | Alternative and other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	0.00%	0.00%
Non-U.S. Plans [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	3.00%	4.00%
Non-U.S. Plans [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	12.00%	27.00%
Non-U.S. Plans [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	36.00%	40.00%
Non-U.S. Plans [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	8.00%	4.00%
Non-U.S. Plans [Member] | Alternative and other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	41.00%	25.00%