CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 25, 2023	Jun. 30, 2024	Jun. 25, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss) from consolidated operations	$ 7.9	$ (0.4)	$ 9.2	$ (6.2)
Change in unrealized cash flow hedge (net of taxes of $0.1 million and $0.5 million for the three and six month period ended June 30, 2024 and $0.6 million and $0.6 million for the three and six month period ended June 25, 2023)	0.0	1.8	1.3	1.8
Change in cumulative translation adjustment	(0.6)	1.6	(1.5)	1.9
Comprehensive income (loss) from consolidated operations	7.3	3.0	9.0	(2.5)
Less: Comprehensive income attributable to noncontrolling interest	0.0	2.3	0.0	3.5
Comprehensive income (loss) attributable to Kratos	$ 7.3	$ 0.7	$ 9.0	$ (6.0)