Income Taxes - Unrecognized Tax Benefits (Details) $ in Millions	3 Months Ended
	Apr. 03, 2021 USD ($)
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at Beginning of Year	$ 1,091
Additions for tax positions of current year	8
Additions for tax positions of prior years	15
Balance at End of Period	$ 1,114