Income Taxes - Schedule of Breakdown of Income Tax Expense Between Current and Deferred (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 30, 2016
Current:
Federal	$ 572	$ 787	$ 540
State	144	117	82
Subtotal Current	716	904	622
Deferred:
Federal	275	(3,277)	355
State	4	44	50
Subtotal Deferred	279	(3,233)	405
Income Tax Expense	$ 995	$ (2,329)	$ 1,027