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Business Combinations - Narratives (Details) - USD ($) $ in Millions |  |  |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 16, 2021 | Dec. 23, 2020 | Nov. 03, 2020 | Oct. 13, 2020 | Jun. 30, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Business Acquisition |  |  |  |  |  |  |  |
Payment for acquisition of businesses, net of cash acquired |  |  |  |  |  | $ 55.0 | $ 0.0 |
Cash acquired from acquisition | $ 0.6 |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 896.1 | 896.1 |  | $ 865.9
Contingent consideration |  |  |  |  | 22.1 | 22.1 |  | 20.1
Increase in fair value of contingent consideration liabilities |  |  |  |  |  | 2.0 |  |
Cryogenic Technologies |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |
Voting percentage acquired | 100.00% |  |  |  |  |  |  |
Payment for acquisition of businesses, net of cash acquired | $ 55.0 |  |  |  |  |  |  |
Net assets acquired, excluding goodwill | 20.5 |  |  |  |  |  |  |
Goodwill | $ 34.5 |  |  |  |  |  |  |
Increase (decrease) in estimated fair value of intangibles |  |  |  |  | 17.6 |  |  |
Identifiable intangible assets |  |  |  |  | 19.5 | 19.5 |  |
SES |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |
Net assets acquired, excluding goodwill |  | $ 13.4 |  |  |  |  |  |
Goodwill |  | 24.0 |  |  |  |  |  |
Identifiable intangible assets |  | 17.3 |  |  |  |  |  |
Payments for acquisition of business excluding working capital adjustments |  | 20.0 |  |  |  |  |  |
Potential earn-out not to exceed amount |  | 25.0 |  |  |  |  |  |
Contingent consideration |  | $ 16.9 |  |  | 18.9 | 18.9 |  | 16.9
Increase in fair value of contingent consideration liabilities |  |  |  |  | 1.3 | 2.0 |  |
BIG |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |
Net assets acquired, excluding goodwill |  |  | $ 7.9 |  |  |  |  |
Goodwill |  |  | 15.7 |  |  |  |  |
Increase (decrease) in estimated fair value of intangibles |  |  |  |  |  | (0.9) |  |
Identifiable intangible assets |  |  | 6.2 |  |  |  |  |
Payments for acquisition of business excluding working capital adjustments |  |  | 20.0 |  |  |  |  |
Potential earn-out not to exceed amount |  |  | 6.0 |  |  |  |  |
Contingent consideration |  |  | $ 3.2 |  | 3.2 | 3.2 |  | $ 3.2
Increase in fair value of contingent consideration liabilities |  |  |  |  | (0.1) | 0.0 |  |
Alabama Trailers |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |
Payments for acquisition of business excluding working capital adjustments |  |  |  | $ 10.0 |  |  |  |
Gain on bargain purchase |  |  |  | $ 5.0 |  |  |  |
Sustainable Energy Solutions And Blue In Green LLC | Minimum | Scenario, Plan |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |
Contingent consideration |  |  |  |  | 0.0 | 0.0 |  |
Sustainable Energy Solutions And Blue In Green LLC | Maximum | Scenario, Plan |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |
Contingent consideration |  |  |  |  | $ 31.0 | $ 31.0 |  |

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