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Related Party Transactions (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Jan. 01, 2019 | Jul. 13, 2018 | Oct. 16, 2017 | Dec. 30, 2018
Related Party Transaction [Line Items] |  |  |  |
Average repurchase price per share |  |  |  | $ 56.02
Jefferies [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Fees and reimbursements of expenses from related party |  | $ 3.0 |  |
Jefferies [Member] | Minimum [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage beneficially owns of common stock |  |  | 10.00% |
Energizer [Member] | Subsequent Event [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Stock consideration, shares | 5,300,000 |  |  |
Energizer [Member] | Minimum [Member] | Subsequent Event [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage beneficially owns of common stock | 4.90% |  |  |
Chairman And Chief Executive Officer [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Shares of common stock repurchased from related parties |  |  |  | 158,318
Value of repuchased common stock from related parties |  |  |  | $ 8.0

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