Contingencies, Significant Estimates and Concentrations (Tables)

12 Months Ended

Sep. 30, 2020

Commitments And Contingencies Disclosure [Abstract]

Schedule of significant portion of revenues from the Department of Defense

The Company derived a significant portion of its revenue from the DoD, as follows (in millions):

	Fiscal Year Ended September 30,
	2020		2019		2018
DoD	$	2,300.4	$	2,006.9	$	1,648.4
Foreign military sales		71.2		27.7		28.0
Total DoD sales	$	2,371.6	$	2,034.6	$	1,676.4