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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 30, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Tax Contingency [Line Items]
Effective tax rate	12.20%	18.00%
Uncertain tax benefits that may be paid within the next twelve months	$ 22
United Kingdom
Income Tax Contingency [Line Items]
Statutory tax rate	19.00%
Singapore
Income Tax Contingency [Line Items]
Statutory tax rate	17.00%		17.00%
Luxembourg
Income Tax Contingency [Line Items]
Statutory tax rate	26.00%
Singapore Economic Development Board
Income Tax Contingency [Line Items]
Statutory tax rate			10.50%