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Acquisition - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 28, 2019 | Nov. 15, 2018 | Jul. 02, 2018 | Jan. 15, 2018 | Dec. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2017 | Jan. 31, 2019 | Jan. 17, 2019 | Jan. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquisition and integration costs |  |  |  |  | $ 51.3 |  |  |  |  |
Selling, General and Administrative Expenses |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquisition and integration costs |  |  |  |  | 18.9 |  | $ 5.7 |  |  |
Interest Expense |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Interest and other financing items |  |  |  |  | 32.4 |  |  |  |  |
Other Items, Net |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions, Net Gains and Losses |  |  |  |  | (9.0) |  |  |  |  |
Spectrum Brands Holdings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  |  | $ 2,000.0 |  |  |  |  |  |
Initial cash paid including estimated working capital adjustments |  |  |  | 1,956.2 |  |  |  |  |  |
Success fees |  |  |  | $ 13.0 |  |  |  |  |  | $ 2.0
Spectrum Brands Holdings | Other Items, Net |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Interest and other financing items |  |  |  |  | (5.8) |  |  |  |  |
Spectrum Brands Holdings | Subsequent Event |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Success fees |  |  |  |  |  |  |  | $ 6.0 |  |
Spectrum Auto Care Acquisition |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  | $ 938.0 |  |  |  |  |  |  |  |
Acquisition purchase price |  | 1,250.0 |  |  |  |  |  |  |  |
Newly-issued common stock in acquisition |  | $ 313.0 |  |  |  |  |  |  |  |
Spectrum Auto Care Acquisition | Subsequent Event |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Initial cash paid including estimated working capital adjustments | $ 938.7 |  |  |  |  |  |  |  |  |
Newly-issued common stock in acquisition (in shares) | 5,278,921 |  |  |  |  |  |  |  |  |
Fair value of equity consideration | $ 240.5 |  |  |  |  |  |  |  |  |
Opening stock price (in dollars per share) | $ 45.55 |  |  |  |  |  |  |  |  |
Additional consideration (in dollars per share) | $ 36,800,000 |  |  |  |  |  |  |  |  |
Spectrum Auto Care Acquisition | Senior Notes, 7.750%, Due 2027 | Subsequent Event |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount of debt |  |  |  |  |  |  |  |  | $ 600.0 |
Stated interest rate of debt |  |  |  |  |  |  |  |  | 7.75% |
Nu Finish Acquisition |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquisition purchase price |  |  | $ 38.1 |  |  |  |  |  |  |
Revenue |  |  |  |  | $ 1.0 |  |  |  |  |
Inventory adjustment |  |  |  |  |  | $ 0.2 |  |  |  |
Other identifiable intangible assets |  |  | $ 21.8 |  |  |  |  |  |  |

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