Contract Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 27, 2020	Jun. 27, 2020	Dec. 31, 2019
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Current Contract Assets, Net	$ 686	$ 686	$ 603
Noncurrent Contract Assets, Net	14	14	17
Current Contract Liabilities	975	975	916
Noncurrent Contract Liabilities	624	624	$ 594
Revenue recognized that was included in the current contract liability balance at the beginning of the period	$ 226	$ 631