Summary of Significant Accounting Policies - Contracts Estimates (Details) - Cumulative catch-up method - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Jan. 04, 2020
Use of Estimates
Cumulative catch-up adjustments	$ 81	$ 72	$ 91
Change in accounting estimate financial effect increase in net income	$ 62	$ 55	$ 69
Change in accounting estimate financial effect increase in income, per share (in dollars per share)	$ 0.27	$ 0.24	$ 0.30
Gross favorable adjustments	$ 154	$ 148	$ 173
Gross unfavorable adjustments	73	76	82
Revenue recognized from performance obligations satisfied in prior periods	$ 93	$ 77	$ 97