Income Taxes (Reconciliation of Statutory U.S. Corporate Federal Income Tax Rate to Effective Income Tax Rate) (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
U.S. federal income tax rate	35.00%	35.00%	35.00%
Changes in rate due to:
U.S. state and local taxes	(2.20%)	1.00%	1.00%
U.S. tax cost (benefit) on foreign dividends	0.40%	(1.00%)	(4.00%)
U.S. tax incentives	(5.40%)	(2.10%)	(2.30%)
U.S. deferred tax on foreign income	(3.00%)	(4.00%)	0.00%
U.S./foreign tax differential	(14.80%)	(7.00%)	(13.00%)
Asbestos charge	18.20%	0.00%	0.00%
Other	0.90%	1.90%	0.90%
Effective income tax rate	29.10%	23.80%	17.60%