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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Tax Contingency [Line Items]
Effective tax rate	3.90%	30.00%	8.10%	23.20%
Uncertain tax benefits that may be paid within the next twelve months	$ 20		$ 20
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%