Income Taxes - Reconciliation of the U.S. Federal Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 25, 2016
Income Tax Disclosure [Abstract]
Statutory rate	(21.00%)	(35.00%)	(35.00%)
State tax provisions, net of federal income tax benefit	6.40%	263.40%	(6.30%)
Tax credits	1.30%	88.90%	0.60%
Foreign income taxes at rates other than the statutory rate	16.80%	1206.60%	11.70%
Valuation allowance and other	(28.00%)	(138.00%)	5.10%
Changes in tax liabilities, net	(0.60%)	(11.30%)	0.50%
Share based compensation	(1.00%)	(61.50%)	(1.20%)
Transaction costs		(372.20%)
US Tax Reform implementation	10.90%	(1918.70%)
US Tax on non-US income	(16.10%)
Non-taxable income	16.30%	152.60%
Other	(4.50%)	31.30%	0.20%
Effective income tax rate	(19.50%)	(793.90%)	(24.40%)