Basis of Presentation and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Oct. 02, 2020

Accounting Policies [Abstract]

Schedule of changes In estimates on contracts

Changes in estimates on contracts were as follows:

	Three Months Ended				Nine Months Ended
	October 2, 2020		September 27, 2019		October 2, 2020		September 27, 2019
	(in millions, except per share amounts)
Favorable impact	$	34	$	23	$	86	$	69
Unfavorable impact	(19)		(11)		(45)		(40)
Net impact to income before income taxes	$	15	$	12	$	41	$	29
Impact on diluted EPS attributable to Leidos common stockholders	$	0.07	$	0.06	$	0.21	$	0.15