Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Mar. 31, 2018	Sep. 29, 2018
Net operating loss carry-forwards and tax credit carry-forwards
Increase in provisional tax impact of the Tax Cuts and Jobs Act	$ 13
Additional tax expense due to change in tax status		$ 22
Tax expense on Federal blender’s credits recognized as revenue		4
One-time Federal blender's credits recognized as revenue		$ 42
Maximum
Net operating loss carry-forwards and tax credit carry-forwards
Anticipated tax expense associated with the global intangible low-taxed income (“GILTI”) and the base-erosion and anti-abuse tax (“BEAT”) provisions of the 2017 Tax Act			$ 1