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Income Taxes - Reconciliation of US Statutory Federal Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure Income Tax Reconciliation Of U S Statutory Federal Tax Rate Detail [Line Items]
US federal statutory rate	21.00%	35.00%	35.00%
State tax	(2.00%)		2.00%
Non-US income taxed at different rates	(2.00%)	(24.00%)	(21.00%)
Enactment of US tax reform (See Note 3)		(6.00%)
Other		7.00%
Effective income tax rate	17.00%	(28.00%)	15.00%
Charges And Credits
Disclosure Income Tax Reconciliation Of U S Statutory Federal Tax Rate Detail [Line Items]
Charges and credits (See Note 3)		(40.00%)	(1.00%)

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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