Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015
Net sales:
Products	$ 1,500	$ 1,600	$ 4,561	$ 4,728
Services	1,005	964	2,961	2,867
Total net sales	2,505	2,564	7,522	7,595
Cost of sales:
Products	(1,355)	(1,409)	(4,095)	(4,312)
Services	(935)	(880)	(2,713)	(2,648)
Total cost of sales	(2,290)	(2,289)	(6,808)	(6,960)
Loss related to business divestitures		(9)		(29)
Goodwill impairment charges		(35)		(35)
Operating income	215	231	714	571
Interest expense	(41)	(43)	(125)	(124)
Interest and other income, net	6	3	15	11
Debt retirement charge			(5)
Income from continuing operations before income taxes	180	191	599	458
Provision for income taxes	(29)	(63)	(130)	(105)
Income from continuing operations	151	128	469	353
Income (loss) from discontinued operations, net of income taxes		(424)	63	(416)
Net income (loss)	151	(296)	532	(63)
Net income from continuing operations attributable to noncontrolling interests	(3)	(3)	(10)	(11)
Net income (loss) attributable to L-3	$ 148	$ (299)	$ 522	$ (74)
Basic earnings (loss) per share attributable to L-3 Holdings' common shareholders:
Continuing operations	$ 1.91	$ 1.56	$ 5.93	$ 4.19
Discontinued operations		(5.30)	0.81	(5.10)
Basic earnings (loss) per share	1.91	(3.74)	6.74	(0.91)
Diluted earnings (loss) per share attributable to L-3 Holdings' common shareholders:
Continuing operations	1.88	1.54	5.83	4.14
Discontinued operations		(5.22)	0.80	(5.03)
Diluted earnings (loss) per share	1.88	(3.68)	6.63	(0.89)
Cash dividends declared per common share	$ 0.70	$ 0.65	$ 2.10	$ 1.95
L-3 Holdings' weighted average common shares outstanding:
Basic	77.3	80.0	77.4	81.5
Diluted	78.8	81.2	78.7	82.7