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Business Acquisitions, Investments and Restructuring Charges - Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
May 02, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Business Acquisition [Line Items] |  |  |  |  |
Income (loss) from unconsolidated equity method investments |  | $ 2.8 | $ (51.8) | $ 0.2 | $ (69.2)
Restructuring charges |  | 6.3 | 6.8 | 27.3 | 18.8
Restructuring expenditures |  |  |  | 32.4 | 17.0
Contract Termination |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Restructuring charges |  | 9.5 |  | 9.5 |
Redesign Of Software Systems |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Restructuring charges |  | 17.8 |  | 17.8 |
Investment Tax Credit Carryforward |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Increase (decrease) in income taxes |  | (8.0) | (35.0) | (8.0) | (60.0)
Certain Limited Liability Companies |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Income (loss) from unconsolidated equity method investments |  | (3.7) | (49.5) | (6.3) | (61.8)
Other Noncurrent Assets |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Capital contributions to noncontrolling equity interest |  |  |  | 34.0 | 121.0
US Ecology |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business combination, consideration transferred | $ 2,200.0 |  |  |  |
US Ecology, Inc. acquisition integration and deal costs |  | $ 6.2 | $ 8.7 | $ 24.3 | $ 65.4

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