Employee Benefit Plans - Schedule of Amount Recognized in Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 30, 2016
Pension Plans
Amounts Recorded in Consolidated Balance Sheets [Abstract]
Long-term Assets	$ 57	$ 9
Current Liabilities	(15)	(15)
Long-term Liabilities	(211)	(326)
Net Amount Recognized in Consolidated Balance Sheets	(169)	(332)
Post-retirement Benefits
Amounts Recorded in Consolidated Balance Sheets [Abstract]
Long-term Assets	0	0
Current Liabilities	(38)	(39)
Long-term Liabilities	(212)	(235)
Net Amount Recognized in Consolidated Balance Sheets	$ (250)	$ (274)