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Business Combinations - Contingent Consideration Rollforward (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Contingent Consideration |  |  |
Beginning balance | $ 17.3 |  |
(Decrease) increase in fair value of contingent consideration liabilities | (8.7) |  |
Acquired contingent consideration liabilities | 2.9 |  |
Payment of contingent consideration | (4.4) |  |
Ending balance | 7.1 | $ 17.3 |
SES |  |  |
Contingent Consideration |  |  |
Beginning balance | 16.3 |  |
(Decrease) increase in fair value of contingent consideration liabilities | (9.2) | 2.8 | $ 2.2
Acquired contingent consideration liabilities | 0.0 |  |
Payment of contingent consideration | 0.0 |  |
Ending balance | 7.1 | 16.3 |
SES | Minimum |  |  |
Contingent Consideration |  |  |
Ending balance | 0.0 |  |
Business combination, potential payout on consideration liability | 0.0 |  |
SES | Maximum |  |  |
Contingent Consideration |  |  |
Ending balance | 12.5 |  |
Business combination, potential payout on consideration liability | 12.5 |  |
BIG |  |  |
Contingent Consideration |  |  |
Beginning balance | 1.0 |  |
(Decrease) increase in fair value of contingent consideration liabilities | 0.7 | 1.1 | $ (1.1)
Acquired contingent consideration liabilities | 0.0 |  |
Payment of contingent consideration | (1.7) |  |
Ending balance | 0.0 | 1.0 |
MP |  |  |
Contingent Consideration |  |  |
Beginning balance | 0.0 |  |
(Decrease) increase in fair value of contingent consideration liabilities | (0.2) |  |
Acquired contingent consideration liabilities | 2.9 |  |
Payment of contingent consideration | (2.7) |  |
Ending balance | $ 0.0 | $ 0.0 |

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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 -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479581/805-30-50-4 + 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 -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479581/805-30-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479668/805-30-25-6 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 35 -Paragraph 1 -Subparagraph (b) -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479613/805-30-35-1 + Details
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