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Restructuring Charges 2020 Plan Restructuring Activity (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance and termination costs | $ 600,000 | $ 44,600,000 | $ 2,100,000 | $ 44,600,000 |
Lease impairment costs | (900,000) | 65,700,000 | (1,100,000) | 65,700,000 |
Other restructuring costs | 100,000 | 2,300,000 | 100,000 | 2,300,000 |
Restructuring charges | (200,000) | $ 112,600,000 | 1,100,000 | 112,600,000 |
Restructuring Reserve | 23,800,000 |  | 23,800,000 |  | $ 74,600,000
DXTRA [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Lease impairment costs | (300,000) |  | (300,000) | 26,800,000 |
Restructuring charges | (300,000) |  | 500,000 | $ 36,700,000 |
Employee Severance [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | 23,800,000 |  | 23,800,000 |  | 74,600,000
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 |  |  | 300,000 |  |
Lease impairment costs |  |  | (1,100,000) |  |
Other restructuring costs |  |  | (100,000) |  |
Restructuring charges |  |  | (900,000) |  |
Cash Payments [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance and termination costs |  |  | 52,600,000 |  |
Lease impairment costs |  |  | 0.0 |  |
Other restructuring costs |  |  | 200,000 |  |
Restructuring charges |  |  | $ 52,800,000 |  |

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