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Share Based Compensation (Summary Of Share Based Compensation Expense) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 01, 2018
Jun. 30, 2018
Jul. 02, 2017
Jun. 30, 2017
Jul. 01, 2018
Jun. 30, 2018
Jul. 02, 2017
Jun. 30, 2017
Share-based compensation   $ 5.3   $ 5.0   $ 6.4   $ 28.5
Spectrum Equity Plan [Member]                
Share-based compensation   4.9   4.4   5.3   23.9
HRG Equity Plan [Member]                
Share-based compensation   0.4   0.6   1.1   4.6
SB/RH Holdings, LLC [Member]                
Share-based compensation $ 4.5 $ 4.5 $ 3.9 $ 3.9 $ 4.0 $ 4.0 $ 21.6 $ 21.6