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Acquisition - Narrative (Details) - USD ($) |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  |
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Jan. 28, 2019 | Jan. 02, 2019 | Nov. 15, 2018 | Jul. 02, 2018 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jan. 31, 2019 | Jan. 31, 2018 | Jan. 15, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  |  |  |  |  |  |  | $ 2,453,800,000 | $ 0 |  |  |
Inventory adjustment |  |  |  |  | $ 5,000,000.0 |  |  | $ 0 | 27,500,000 | (26,500,000) |  |  |
Inventory fair value adjustment |  |  |  |  | 11,200,000 |  |  |  | 11,200,000 |  |  |  |
Cost to sell |  |  |  |  |  |  |  |  | 107,200,000 |  |  |  |
Acquisition and integration costs |  |  |  |  |  |  |  | 15,900,000 |  |  |  |  |
Pre-tax gain related to favorable movement in escrowed restricted cash |  |  |  |  |  |  |  |  | (9,000,000.0) | (9,900,000) |  |  |
Settlement of acquired business hedging contracts |  |  |  |  | 0 |  |  | 0 | 1,500,000 | 0 |  |  |
Earnings related to transition service agreements |  |  |  |  | 700,000 |  |  | 0 | 800,000 | 0 |  |  |
Tax withholding costs related to anticipated cash movement to fund acquisition |  |  |  |  | 500,000 |  |  |  | 6,000,000.0 |  |  |  |
Divestment Business |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease in goodwill |  |  |  |  | (50,000,000.0) |  |  |  |  |  |  |  |
Segment Reconciling Items |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and integration costs |  |  |  |  | 28,000,000.0 |  |  | 15,900,000 | 159,900,000 | 41,000,000.0 |  |  |
Interest and other financing items |  |  |  |  | (51,900,000) |  |  | (14,300,000) | (111,700,000) | (41,300,000) |  |  |
Cost of products sold |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory adjustment |  |  |  |  | 6,500,000 |  |  |  | 33,700,000 |  |  |  |
Acquisition and integration costs |  |  |  |  | 12,400,000 |  |  |  | 44,100,000 |  |  |  |
Selling, General and Administrative Expenses |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and integration costs |  |  |  |  | 28,000,000.0 |  |  |  | 159,900,000 | 41,000,000.0 |  |  |
Selling, General and Administrative Expenses | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and integration costs |  |  |  |  | 15,100,000 |  |  | (22,400,000) | 63,100,000 | 44,600,000 |  |  |
Research and Development Expense |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and integration costs |  |  |  |  |  |  |  |  | 300,000 |  |  |  |
Interest Expense |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest and other financing items |  |  |  |  |  |  |  | $ 3,400,000 | 65,600,000 | $ 6,300,000 |  |  |
Other Items, Net |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax expenses |  |  |  |  | 200,000 |  |  |  |  |  |  |  |
Pre-tax income |  |  |  |  |  |  |  |  | 13,200,000 |  |  |  |
Settlement of acquired business hedging contracts |  |  |  |  | 1,500,000 |  |  |  |  |  |  |  |
Spectrum Brands Holdings |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  | $ 2,000,000,000.0 |  |  |  |  |  |  |  |  |  |  |
Initial cash paid including estimated working capital adjustments |  | 1,956,200,000 |  |  |  |  |  |  |  |  |  |  |
Cash consideration initially allocated to divested business |  | $ 400,000,000.0 |  |  |  |  |  |  |  |  |  |  |
Success fees |  |  |  |  |  |  |  |  |  |  | $ 6,000,000.0 | $ 2,000,000.0 | $ 13,000,000.0
Inventory adjustment |  |  |  |  | 0 |  |  |  | 14,200,000 |  |  |  |
Inventory fair value adjustment |  |  |  |  | 11,200,000 |  |  |  | 11,200,000 |  |  |  |
Decrease in goodwill |  |  |  |  |  |  |  |  | 513,000,000.0 |  |  |  |
Net sales |  |  |  |  | 109,100,000 |  |  |  | 209,000,000.0 |  |  |  |
Earnings before income taxes |  |  |  |  | 6,100,000 |  |  |  | (6,300,000) |  |  |  |
Spectrum Brands Holdings | Other Items, Net |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest and other financing items |  |  |  |  |  |  |  |  | (5,800,000) |  |  |  |
Pre-tax income |  |  |  |  |  |  |  |  | 13,200,000 |  |  |  |
Spectrum Auto Care Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  | $ 937,500,000 |  |  |  |  |  |  |  |  |  |
Initial cash paid including estimated working capital adjustments | $ 938,700,000 |  |  |  |  |  |  |  |  |  |  |  |
Inventory adjustment |  |  |  |  | 1,700,000 | $ 19,500,000 |  |  |  |  |  |  |
Decrease in goodwill |  |  |  |  |  |  |  |  | 702,900,000 |  |  |  |
Acquisition purchase price |  |  | 1,250,000,000.0 |  |  |  |  |  |  |  |  |  |
Newly-issued common stock in acquisition | $ 5,300,000 |  | $ 312,500,000 |  |  |  |  |  |  |  |  |  |
Newly-issued common stock in acquisition (in shares) | 5,278,921 |  |  |  |  |  |  |  |  |  |  |  |
Fair value of equity consideration | $ 240,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Opening stock price (in dollars per share) | $ 45.55 |  |  |  |  |  |  |  |  |  |  |  |
Additional consideration (in dollars per share) | $ 36,800,000 |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  | 135,600,000 |  |  |  | 220,100,000 |  |  |  |
Earnings before income taxes |  |  |  |  | 13,600,000 |  |  |  | 16,400,000 |  |  |  |
Spectrum Auto Care Acquisition | Pro Forma |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  | 7,600,000 |  |  |  | 14,700,000 |  |  |  |
Spectrum Auto Care Acquisition | Cost of products sold |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory adjustment |  |  |  |  | 6,500,000 | $ 13,000,000.0 |  |  | 19,500,000 |  |  |  |
Nu Finish Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory adjustment |  |  |  |  |  |  | $ 200,000 |  |  |  |  |  |
Acquisition purchase price |  |  |  | $ 38,100,000 |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  | 3,000,000.0 |  |  |  | 5,900,000 |  |  |  |
Earnings before income taxes |  |  |  |  | 600,000 |  |  |  | $ 200,000 |  |  |  |
Other intangible assets, net |  |  |  | $ 21,800,000 |  |  |  |  |  |  |  |  |
Foreign currency contracts | Not Designated as Hedging Instrument | Other Items, Net | Divestment Business |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Loss related to hedge contract |  |  |  |  | $ 900,000 |  |  |  |  |  |  |  |

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