CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 25, 2023	Jun. 26, 2022	Jun. 25, 2023	Jun. 26, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (0.4)	$ (4.4)	$ (6.2)	$ (20.3)
Change in unrealized cash flow hedge (net of taxes of $0.6 million at June 25, 2023)	1.8	0.0	1.8	0.0
Change in cumulative translation adjustment	1.6	(0.6)	1.9	(0.6)
Comprehensive income (loss)	3.0	(5.0)	(2.5)	(20.9)
Less: Comprehensive income attributable to noncontrolling interest	2.3	0.3	3.5	0.3
Comprehensive income (loss) attributable to Kratos	$ 0.7	$ (5.3)	$ (6.0)	$ (21.2)