CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Total revenues	$ 205.1	$ 170.4	$ 399.3	$ 339.3
Total costs	153.1	124.4	296.3	247.5
Gross profit	52.0	46.0	103.0	91.8
Selling, general and administrative expenses	38.2	36.0	76.1	70.9
Merger and acquisition expenses	0.1	1.0	0.3	1.4
Research and development expenses	10.2	6.0	18.2	11.7
Restructuring expenses and other	0.2	0.1	0.2	0.2
Operating income	3.3	2.9	8.2	7.6
Other expense:
Interest expense, net	(5.7)	(5.6)	(11.6)	(11.0)
Other income (expense), net	0.0	0.3	0.2	(0.2)
Total other expense, net	(5.7)	(5.3)	(11.4)	(11.2)
Loss from continuing operations before income taxes	(2.4)	(2.4)	(3.2)	(3.6)
Benefit for income taxes from continuing operations	(3.6)	(1.8)	(6.3)	(3.2)
Income (loss) from continuing operations	1.2	(0.6)	3.1	(0.4)
Loss from discontinued operations before income taxes	(0.4)	(0.4)	(0.4)	(0.8)
Income tax benefit	0.1	0.2	0.1	0.2
Loss from discontinued operations	(0.3)	(0.2)	(0.3)	(0.6)
Net income (loss)	0.9	(0.8)	2.8	(1.0)
Less: Net loss attributable to noncontrolling interest	(0.2)	(0.1)	(0.2)	(0.1)
Net income (loss) attributable to Kratos	$ 1.1	$ (0.7)	$ 3.0	$ (0.9)
Basic income (loss) per common share attributable to Kratos:
Income (loss) from continuing operations (in dollars per share)	$ 0.01	$ (0.01)	$ 0.02	$ 0
Loss from discontinued operations (in dollars per share)	0	0	0	(0.01)
Net income (loss) per common share (in dollars per share)	0.01	(0.01)	0.02	(0.01)
Diluted income (loss) per common share attributable to Kratos:
Income (loss) from continuing operations (in dollars per share)	0.01	(0.01)	0.02	0
Loss from discontinued operations (in dollars per share)	0	0	0	(0.01)
Net income (loss) per common share (in dollars per share)	$ 0.01	$ (0.01)	$ 0.02	$ (0.01)
Weighted average common shares outstanding:
Basic (in shares)	124.7	108.3	124.4	107.8
Diluted (in shares)	127.7	108.3	127.8	107.8
Service revenues
Total revenues	$ 58.0	$ 62.9	$ 115.3	$ 126.5
Total costs	41.3	46.2	83.8	91.4
Product sales
Total revenues	147.1	107.5	284.0	212.8
Total costs	$ 111.8	$ 78.2	$ 212.5	$ 156.1