CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Total revenues	$ 811.5	$ 747.7	$ 717.5
Total costs	586.4	544.5	527.5
Gross profit	225.1	203.2	190.0
Selling, general and administrative expenses	160.2	144.5	130.8
Merger and acquisition related items	1.8	1.7	2.3
Research and development expenses	35.2	27.0	18.0
Restructuring expenses and other	0.0	0.7	0.9
Operating income	27.9	29.3	38.0
Other expense:
Interest expense, net	(23.4)	(22.8)	(21.6)
Other income (expense), net	(0.1)	0.3	(0.7)
Total other expense, net	(23.5)	(22.5)	(22.3)
Income from continuing operations before income taxes	4.4	6.8	15.7
Provision (benefit) for income taxes from continuing operations	3.9	(73.5)	4.8
Income from continuing operations	0.5	80.3	10.9
Income (loss) from operations of discontinued component	(2.3)	(1.2)	1.9
Income tax expense (benefit)	(0.2)	(0.3)	0.2
Income (loss) from discontinued operations	(2.1)	(0.9)	1.7
Net income (loss)	(1.6)	79.4	12.6
Less: Net income (loss) attributable to noncontrolling interest	0.4	(0.2)	0.1
Net income (loss) attributable to Kratos	$ (2.0)	$ 79.6	$ 12.5
Basic income and (loss) per common share attributable to Kratos:
Income from continuing operations (in dollars per share)	$ 0.00	$ 0.70	$ 0.10
Income (loss) from discontinued operations (in dollars per share)	(0.02)	(0.01)	0.02
Net income (loss) per common share (in dollars per share)	(0.02)	0.69	0.12
Diluted income (loss) per common share attributable to Kratos:
Income from continuing operations (in dollars per share)	0.00	0.68	0.10
Income (loss) from discontinued operations (in dollars per share)	(0.02)	(0.01)	0.01
Net income (loss) per common share (in dollars per share)	$ (0.02)	$ 0.67	$ 0.11
Weighted average common shares outstanding:
Basic (in shares)	124.6	115.5	106.0
Diluted (in shares)	128.0	118.7	109.2
Service revenues
Total revenues	$ 219.4	$ 248.7	$ 272.6
Total costs	156.2	182.5	192.0
Product sales
Total revenues	592.1	499.0	444.9
Total costs	$ 430.2	$ 362.0	$ 335.5