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Income Taxes - Deferred Income Taxes - Undistributed Earnings from Foreign Subsidiaries - Narrative (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Apr. 28, 2019
Apr. 29, 2018
Apr. 30, 2017
Income Taxes [Line Items]        
Undistributed earnings from our foreign subsidiaries that will not be reinvested indefinitely $ 156,700      
U.S. foreign income tax credits $ 42,200      
Deferred tax liability, undistributed earnings from foreign subsidiaries     $ 4,256 $ 43,978
Scenario, Forecast [Member]        
Income Taxes [Line Items]        
Dividends received deduction percentage for earnings and profits received from foreign corporation   100.00%    
Dividends received deduction, foreign corporation ownership percentage   10.00%