CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2020	Mar. 29, 2019
Income Statement [Abstract]
Revenues	$ 2,889	$ 2,577
Cost of revenues	2,494	2,221
Selling, general and administrative expenses	197	166
Acquisition, integration and restructuring costs	12	2
Equity earnings of non-consolidated subsidiaries	(6)	(4)
Operating income	192	192
Non-operating (expense) income:
Interest expense, net	(48)	(38)
Other (expense) income, net	(14)	92
Income before income taxes	130	246
Income tax expense	(15)	(57)
Net income attributable to Leidos common stockholders	$ 115	$ 189
Earnings per share:
Basic (dollars per share)	$ 0.81	$ 1.30
Diluted (dollars per share)	$ 0.80	$ 1.29