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v3.20.4

Restructuring and Related Activities (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 USD ($) ft² | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) ft² numberOfPeople | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Severance and termination costs |  |  |  |  |  |  |  |  | $ 140,400,000 | $ 22,000,000.0 | $ 0.0
Lease Restructuring Cost |  |  |  |  |  |  |  |  | 256,000,000.0 | 11,900,000 | 0.0
Other Restructuring Costs |  |  |  |  |  |  |  |  | 17,400,000 | 0.0 | 0.0
Restructuring Charges | $ 253,900,000 | $ 47,300,000 | $ 112,600,000 | $ 0.0 | $ 0.0 | $ 0.0 | $ 2,100,000 | $ 31,800,000 | 413,800,000 | $ 33,900,000 | $ 0.0
Restructuring Reserve | $ 74,600,000 |  |  |  |  |  |  |  | $ 74,600,000 |  |
Restructuring and Related Cost, Number of Positions Eliminated | numberOfPeople |  |  |  |  |  |  |  |  | 1,520 |  |
Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date Percent | 3.00% |  |  |  |  |  |  |  | 3.00% |  |
Area of Real Estate Property | ft² | 1,700,000 |  |  |  |  |  |  |  | 1,700,000 |  |
IAN |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease Restructuring Cost |  |  |  |  |  |  |  |  | $ 190,400,000 |  |
Restructuring Charges |  |  |  |  |  |  |  |  | 317,900,000 |  |
DXTRA |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease Restructuring Cost |  |  |  |  |  |  |  |  | 59,800,000 |  |
Restructuring Charges |  |  |  |  |  |  |  |  | 78,800,000 |  |
Non-cash Items [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Severance and termination costs |  |  |  |  |  |  |  |  | 4,500,000 |  |
Lease Restructuring Cost |  |  |  |  |  |  |  |  | 256,000,000.0 |  |
Other Restructuring Costs |  |  |  |  |  |  |  |  | 5,100,000 |  |
Restructuring Charges |  |  |  |  |  |  |  |  | 265,600,000 |  |
Cash Payments [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Severance and termination costs |  |  |  |  |  |  |  |  | 61,300,000 |  |
Lease Restructuring Cost |  |  |  |  |  |  |  |  | 0.0 |  |
Other Restructuring Costs |  |  |  |  |  |  |  |  | 12,300,000 |  |
Restructuring Charges |  |  |  |  |  |  |  |  | 73,600,000 |  |
Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve | $ 74,600,000 |  |  |  |  |  |  |  | 74,600,000 |  |
Lease impairment costs [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve | 0.0 |  |  |  |  |  |  |  | 0.0 |  |
Other Restructuring [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve | $ 0.0 |  |  |  |  |  |  |  | $ 0.0 |  |

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