CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Sep. 25, 2022	Oct. 01, 2023	Sep. 25, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3.0	$ (8.0)	$ (3.2)	$ (28.3)
Change in unrealized cash flow hedge (net of taxes of $0.5 million and $1.1 million for the three and nine month periods ended October 1, 2023, respectively)	1.4	0.0	3.2	0.0
Change in cumulative translation adjustment	(1.8)	(3.7)	0.1	(4.3)
Comprehensive income (loss)	2.6	(11.7)	0.1	(32.6)
Less: Comprehensive income attributable to noncontrolling interest	4.6	0.0	8.1	0.3
Comprehensive loss attributable to Kratos	$ (2.0)	$ (11.7)	$ (8.0)	$ (32.9)