CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 26, 2022	Jun. 27, 2021	Jun. 26, 2022	Jun. 27, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (4.4)	$ 0.9	$ (20.3)	$ 2.8
Change in cumulative translation adjustment	(0.6)	0.6	(0.6)	0.8
Comprehensive income (loss)	(5.0)	1.5	(20.9)	3.6
Less: Comprehensive income (loss) attributable to noncontrolling interest	0.3	(0.2)	0.3	(0.2)
Comprehensive income (loss) attributable to Kratos	$ (5.3)	$ 1.7	$ (21.2)	$ 3.8