Changes in Estimates (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 02, 2021	Apr. 03, 2020
Change in Accounting Estimate [Line Items]
Revenue recognized from performance obligations satisfied in prior periods	$ 108	$ 136
Contracts Accounted for under Percentage of Completion
Change in Accounting Estimate [Line Items]
Net EAC adjustments, before income taxes	82	103
Net EAC adjustments, net of income taxes	$ 62	$ 78
Net EAC adjustments, net of income taxes, per diluted common share (in dollars per share)	$ 0.30	$ 0.35