XML 101 R48.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Summary of Significant Accounting Policies - Contract Assets and Liabilities (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2019
Oct. 01, 2018
Accounting Policies [Abstract]    
Contract asset $ 0.3 $ 0.7
Contract liability 3.0 2.1
Contract liability recognized as revenue 2.1  
Contract costs $ 0.5 $ 0.1