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Business Combinations - Contingent Consideration Rollforward (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Contingent Consideration |  |  |  |
Balance at December 31, 2021 |  |  | $ 21.2 |
Decrease in fair value of contingent consideration liabilities |  |  | (1.0) |
Balance at June 30, 2022 | $ 20.2 |  | 20.2 |
SES |  |  |  |
Contingent Consideration |  |  |  |
Balance at December 31, 2021 |  |  | 19.1 |
Decrease in fair value of contingent consideration liabilities | (0.3) | $ 1.3 | (0.8) | $ 2.0
Balance at June 30, 2022 | 18.3 |  | 18.3 |
BIG |  |  |  |
Contingent Consideration |  |  |  |
Balance at December 31, 2021 |  |  | 2.1 |
Decrease in fair value of contingent consideration liabilities | 0.1 | $ (0.1) | (0.2) |
Balance at June 30, 2022 | $ 1.9 |  | $ 1.9 |

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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=126975305&loc=d3e7008-128479 + Details
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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126975305&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126966325&loc=d3e6819-128478 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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