UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
	May 08, 2018	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Net sales:
Products		$ 1,786	$ 1,680	$ 3,432	$ 3,284
Services		797	705	1,522	1,422
Total net sales		2,583	2,385	4,954	4,706
Operating costs and expenses:
Cost of sales — Products		(1,349)	(1,253)	(2,540)	(2,441)
Cost of sales — Services		(578)	(479)	(1,110)	(1,017)
General and administrative expenses		(383)	(359)	(780)	(717)
Total operating costs and expenses		(2,310)	(2,091)	(4,430)	(4,175)
Gain on sale of the Crestview Aerospace and TCS businesses		48	0	48	0
Operating income		321	294	572	531
Interest expense		(44)	(42)	(85)	(84)
Interest and other income, net		8	2	14	6
Debt retirement charge		(48)	0	(48)	0
Income from continuing operations before income taxes		237	254	453	453
Provision for income taxes		(48)	(59)	(72)	(101)
Income from continuing operations		189	195	381	352
Income from discontinued operations, net of income taxes		190	12	206	23
Net income		379	207	587	375
Net income from continuing operations attributable to noncontrolling interests		(4)	(5)	(9)	(9)
Net income attributable to L3		$ 375	$ 202	$ 578	$ 366
Basic earnings per share attributable to common shareholders:
Continuing operations (in dollars per share)		$ 2.36	$ 2.44	$ 4.75	$ 4.40
Discontinued operations (in dollars per share)		2.42	0.15	2.63	0.30
Basic earnings per share (in dollars per share)		4.78	2.59	7.38	4.70
Diluted earnings per share attributable to common shareholders:
Continuing operations (in dollars per share)		2.33	2.39	4.67	4.32
Discontinued operations (in dollars per share)		2.39	0.15	2.59	0.29
Diluted earnings per share (in dollars per share)		4.72	2.54	7.26	4.61
Cash dividends declared per common share (in dollars per share)	$ 0.80	$ 0.8	$ 0.75	$ 1.6	$ 1.50
Weighted average common shares outstanding:
Basic (in shares)		78.4	78.0	78.3	77.8
Diluted (in shares)		79.4	79.5	79.6	79.4