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RESTRUCTURING AND RELATED CHARGES - Narrative (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | ---
Aug. 05, 2022 position | Jan. 31, 2023 USD ($) position | Apr. 30, 2020 position | Mar. 31, 2023 USD ($) employee
600 West Chicago |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Option to lease early termination penalty |  | $ 9.6 |  |
2022 Restructuring Plan, First Phase |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Reduction in number of positions (in employees) | position | 1,000 |  |  |
2022 Restructuring Plan, First Phase | Minimum |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Expected restructuring cost (up to) |  |  |  | $ 20.0
2022 Restructuring Plan, First Phase | Maximum |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Expected restructuring cost (up to) |  |  |  | $ 27.0
2022 Restructuring Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Reduction in number of positions (in employees) |  | 1,000 |  | 8
Restructuring and related charges, incurred to date |  |  |  | $ 18.6
2020 Restructuring Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Reduction in number of positions (in employees) | position |  |  | 1,600 |
Restructuring and related charges, incurred to date |  |  |  | $ 109.2

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