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RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands |  | 12 Months Ended | 21 Months Ended |
--- | --- | --- | --- | ---
Nov. 12, 2020 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) position | Nov. 30, 2019 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Non-cash charges |  | $ 6,655 | $ 4,692 |  |
Impairment charge, operating lease |  | 1,968 |  |  |
Impairment charge, leasehold improvements |  | 671 |  |  |
Personnel Related Costs |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Non-cash charges |  | 0 | 0 |  |
Facilities, Exit Costs and Other |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Non-cash charges |  |  | 0 |  |
Consumer and Professional Products |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges |  | 21,418 | 13,669 | $ 35,087 |
Non-cash charges |  |  | 4,692 | $ 11,347 |
Impairment of inventory |  | 4,158 | 304 |  |
Impairment of machinery and equipment |  | 1,882 | 1,749 |  |
Impairment charge, operating lease |  |  | 1,968 |  |
Impairment charge, leasehold improvements |  |  | 671 |  |
Number of headcount reduced | position |  |  |  | 400 |
Consumer and Professional Products | Next-generation Business Platform |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Duration of project, extension | 1 year |  |  |  |
Cash charges |  | 14,763 |  |  |
Non-cash charges |  | 6,655 |  |  |
Impairment of inventory |  | 6,655 |  |  |
Consumer and Professional Products | Next-generation Business Platform | Minimum |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Effect on future cash flows, amount | $ 30,000 |  |  |  |
Restructuring and related cost, expected reduction in inventory | 30,000 |  |  |  |
Consumer and Professional Products | Next-generation Business Platform | Maximum |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Effect on future cash flows, amount | 35,000 |  |  |  |
Restructuring and related cost, expected reduction in inventory | 35,000 |  |  |  |
Consumer and Professional Products | Employee Severance and Facility Closing |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Cash charges |  |  | 8,977 | $ 23,740 |
Consumer and Professional Products | Employee Severance and Facility Closing | Next-generation Business Platform |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and related cost | 46,000 |  |  |  |
Consumer and Professional Products | Personnel Related Costs |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Cash charges |  |  | 5,620 | 8,810 |
Consumer and Professional Products | Personnel Related Costs | Next-generation Business Platform |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and related cost | 26,000 |  |  |  |
Cash charges |  | 3,190 |  |  |
Consumer and Professional Products | Facilities, Exit Costs and Other |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Cash charges |  |  | $ 3,357 |  |
Consumer and Professional Products | Facilities, Exit Costs and Other | Next-generation Business Platform |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and related cost | 20,000 |  |  |  |
Cash charges |  | $ 11,573 |  | $ 14,930 |
Consumer and Professional Products | One Time Charges |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and related cost |  |  |  |  | $ 65,000
Consumer and Professional Products | One Time Charges | Next-generation Business Platform |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and related cost | 65,000 |  |  |  |
Consumer and Professional Products | Capital Investments |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and related cost |  |  |  |  | 65,000
Consumer and Professional Products | Capital Investments | Next-generation Business Platform |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and related cost | 65,000 |  |  |  |
Consumer and Professional Products | Asset Write-Downs |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and related cost |  |  |  |  | $ 19,000
Consumer and Professional Products | Asset Write-Downs | Next-generation Business Platform |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and related cost | $ 19,000 |  |  |  |

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