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Restructuring Charges 2020 Plan Restructuring Activity (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance and termination costs | $ 0.1 | $ 0.0 | $ 0.4 | $ 0.3 |
Lease impairment costs | (2.4) | 0.0 | (1.2) | 5.3 |
Other restructuring costs | 0.6 | (0.1) | 0.7 | 0.9 |
Restructuring charges | (1.7) | $ (0.1) | (0.1) | $ 6.5 |
Restructuring Reserve |  |  |  |  | $ 2.3
Employee Severance [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | 1.1 |  | 1.1 |  | 2.3
Lease impairment costs [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | 0.0 |  | 0.0 |  | 0.0
Other Restructuring [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | $ 0.0 |  | 0.0 |  | $ 0.0
Non-cash Items [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance and termination costs |  |  | 0.0 |  |
Lease impairment costs |  |  | (0.5) |  |
Restructuring charges |  |  | (0.5) |  |
Cash Payments [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance and termination costs |  |  | 1.6 |  |
Lease impairment costs |  |  | 0.0 |  |
Restructuring charges |  |  | $ 1.6 |  |

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