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Note 10 - Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 23, 2021 | Nov. 02, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Goodwill, Ending Balance |  |  |  | $ 1,760.8 | $ 1,676.0 |  | $ 2,047.6 |
Less: cash acquired |  |  |  | 8.0 | 17.4 |  | 9.3 |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  | 83.3 | 448.9 |  | 289.8 |
Net cash purchase price |  |  |  | 83.3 | 448.9 |  | 289.8 |
Krug Sachverständigen GmbH [Member] |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  | 7.0 |  |  |  |
Accounts receivable |  |  |  | 1.8 |  |  |  |
Other current assets |  |  |  | 3.8 |  |  |  |
Fixed assets |  |  |  | 0.2 |  |  |  |
Operating lease right-of-use assets, net |  |  |  | 0.0 |  |  |  |
Intangible assets |  |  |  | 15.1 |  |  |  |
Goodwill, Ending Balance |  |  |  | 33.1 |  |  |  |
Total assets acquired |  |  |  | 61.0 |  |  |  |
Accounts payable and accrued liabilities |  |  |  | 5.8 |  |  |  |
Operating lease liabilities |  |  |  | 0.0 |  |  |  |
Deferred income tax, net |  |  |  | 4.8 |  |  |  |
Other noncurrent liabilities |  |  |  | 0.1 |  |  |  |
Total liabilities assumed |  |  |  | 10.7 |  |  |  |
Net assets acquired |  |  |  | 50.3 |  |  |  |
Less: cash acquired |  |  |  | 7.0 |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  | 43.3 |  |  |  |
Net cash purchase price |  |  |  | 43.3 |  |  |  |
Acquisition, Others [Member] |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  | 1.0 | 0.0 | [1] | 3.7 | [1]
Accounts receivable |  |  |  | 0.8 | 0.0 |  | 1.4 |
Other current assets |  |  |  | 0.1 | 0.1 |  | 1.0 |
Fixed assets |  |  |  | 0.1 | 0.3 |  | 0.1 |
Operating lease right-of-use assets, net |  |  |  | 0.2 | 0.0 |  | 1.3 |
Intangible assets |  |  |  | 18.4 | 2.3 |  | 19.0 |
Goodwill, Ending Balance |  |  |  | 22.8 | 3.0 |  | 39.6 |
Total assets acquired |  |  |  | 43.4 | 5.7 |  | 66.2 |
Accounts payable and accrued liabilities |  |  |  | 2.1 |  |  |  |
Operating lease liabilities |  |  |  | 0.1 | 0.0 |  | 1.4 |
Deferred income tax, net |  |  |  | 3.9 | 0.5 |  | 3.7 |
Other noncurrent liabilities |  |  |  | 1.4 | 0.2 |  | 0.0 |
Total liabilities assumed |  |  |  | 7.5 | 0.9 |  | 8.2 |
Net assets acquired |  |  |  | 35.9 | 4.8 |  | 58.0 |
Less: cash acquired |  |  |  | 1.0 | 0.0 |  | 3.7 |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  | 34.9 | 4.8 |  | 34.5 |
Other assets |  |  |  |  | 0.0 |  | 0.1 |
Current liabilities | [1] |  |  |  | 0.1 |  | 1.7 |
Deferred revenues |  |  |  |  | 0.1 |  | 1.4 |
Net cash purchase price |  |  |  | 34.9 | 4.8 |  | 34.5 |
Less: Noncontrolling interests |  |  |  |  |  |  | 19.8 |
Acquisition 2023 [Member] |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  | 8.0 |  |  |  |
Accounts receivable |  |  |  | 2.6 |  |  |  |
Other current assets |  |  |  | 3.9 |  |  |  |
Fixed assets |  |  |  | 0.3 |  |  |  |
Operating lease right-of-use assets, net |  |  |  | 0.2 |  |  |  |
Intangible assets |  |  |  | 33.5 |  |  |  |
Goodwill, Ending Balance |  |  |  | 55.9 |  |  |  |
Total assets acquired |  |  |  | 104.4 |  |  |  |
Accounts payable and accrued liabilities |  |  |  | 7.9 |  |  |  |
Operating lease liabilities |  |  |  | 0.1 |  |  |  |
Deferred income tax, net |  |  |  | 8.7 |  |  |  |
Other noncurrent liabilities |  |  |  | 1.5 |  |  |  |
Total liabilities assumed |  |  |  | 18.2 |  |  |  |
Net assets acquired |  |  |  | 86.2 |  |  |  |
Less: cash acquired |  |  |  | 8.0 |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  | 78.2 |  |  |  |
Net cash purchase price |  |  |  | $ 78.2 |  |  |  |
Opta Information Intelligence Corp. [Member] |  |  |  |  |  |  |  |
Cash and cash equivalents | [1] |  |  |  | 0.4 |  |  |
Accounts receivable |  |  |  |  | 5.2 |  |  |
Other current assets |  |  |  |  | 1.3 |  |  |
Fixed assets |  |  |  |  | 1.5 |  |  |
Operating lease right-of-use assets, net |  |  |  |  | 1.1 |  |  |
Intangible assets |  |  |  |  | 87.0 |  |  |
Goodwill, Ending Balance |  |  |  |  | 141.1 |  |  |
Total assets acquired |  |  |  |  | 237.6 |  |  |
Operating lease liabilities |  |  |  |  | 1.1 |  |  |
Deferred income tax, net |  |  |  |  | 13.5 |  |  |
Other noncurrent liabilities |  |  |  |  | 0.0 |  |  |
Total liabilities assumed |  |  |  |  | 19.7 |  |  |
Net assets acquired |  |  |  |  | 217.9 |  |  |
Less: cash acquired |  |  |  |  | 0.4 |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  | 217.5 |  |  |
Other assets |  |  |  |  | 0.0 |  |  |
Current liabilities | [1] |  |  |  | 4.9 |  |  |
Deferred revenues |  |  |  |  | 0.2 |  |  |
Net cash purchase price |  |  |  |  | 217.5 |  |  |
Infutor Data Solutions, LLC [Member] |  |  |  |  |  |  |  |
Cash and cash equivalents | [1] |  |  |  | 17.0 |  |  |
Accounts receivable |  |  |  |  | 10.7 |  |  |
Other current assets |  |  |  |  | 3.8 |  |  |
Fixed assets |  |  |  |  | 0.9 |  |  |
Operating lease right-of-use assets, net |  |  |  |  | 2.3 |  |  |
Intangible assets |  |  |  |  | 83.4 |  |  |
Goodwill, Ending Balance |  |  |  |  | 140.3 |  |  |
Total assets acquired |  |  |  |  | 258.5 |  |  |
Operating lease liabilities |  |  |  |  | 3.3 |  |  |
Deferred income tax, net |  |  |  |  | 0.0 |  |  |
Other noncurrent liabilities |  |  |  |  | 0.0 |  |  |
Total liabilities assumed |  |  |  |  | 20.8 |  |  |
Net assets acquired |  |  |  |  | 237.7 |  |  |
Less: cash acquired |  |  |  |  | 17.0 |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  | 220.7 |  |  |
Other assets |  |  |  |  | 0.1 |  |  |
Current liabilities | [1] |  |  |  | 14.4 |  |  |
Deferred revenues |  |  |  |  | 3.1 |  |  |
Net cash purchase price |  |  |  |  | 220.7 |  |  |
2022 Acquisition [Member] |  |  |  |  |  |  |  |
Cash and cash equivalents | [1] |  |  |  | 17.4 |  |  |
Accounts receivable |  |  |  |  | 15.9 |  |  |
Other current assets |  |  |  |  | 5.2 |  |  |
Fixed assets |  |  |  |  | 2.7 |  |  |
Operating lease right-of-use assets, net |  |  |  |  | 3.4 |  |  |
Intangible assets |  |  |  |  | 172.7 |  |  |
Goodwill, Ending Balance |  |  |  |  | 284.4 |  |  |
Total assets acquired |  |  |  |  | 501.8 |  |  |
Operating lease liabilities |  |  |  |  | 4.4 |  |  |
Deferred income tax, net |  |  |  |  | 14.0 |  |  |
Other noncurrent liabilities |  |  |  |  | 0.2 |  |  |
Total liabilities assumed |  |  |  |  | 41.4 |  |  |
Net assets acquired |  |  |  |  | 460.4 |  |  |
Less: cash acquired |  |  |  |  | 17.4 |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  | 443.0 |  |  |
Other assets |  |  |  |  | 0.1 |  |  |
Current liabilities | [1] |  |  |  | 19.4 |  |  |
Deferred revenues |  |  |  |  | 3.4 |  |  |
Net cash purchase price |  |  |  |  | $ 443.0 |  |  |
ACTINEO [Member] |  |  |  |  |  |  |  |
Cash and cash equivalents | [1] |  |  |  |  |  | 0.2 |
Accounts receivable |  |  |  |  |  |  | 1.8 |
Other current assets |  |  |  |  |  |  | 0.0 |
Fixed assets |  |  |  |  |  |  | 1.4 |
Operating lease right-of-use assets, net |  |  |  |  |  |  | 4.2 |
Intangible assets |  |  |  |  |  |  | 48.3 |
Goodwill, Ending Balance |  |  |  |  |  |  | 121.9 |
Total assets acquired |  |  |  |  |  |  | 177.8 |
Operating lease liabilities |  |  |  |  |  |  | 4.2 |
Deferred income tax, net |  |  |  |  |  |  | 15.8 |
Other noncurrent liabilities |  |  |  |  |  |  | 0.0 |
Total liabilities assumed |  |  |  |  |  |  | 22.1 |
Net assets acquired |  |  |  |  |  |  | 155.7 |
Less: cash acquired |  |  |  |  |  |  | 0.2 |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  | $ 148.9 |  |  |  |  | 148.9 |
Other assets |  |  |  |  |  |  | 0.0 |
Current liabilities | [1] |  |  |  |  |  | 2.1 |
Deferred revenues |  |  |  |  |  |  | 0.0 |
Net cash purchase price |  | $ 148.9 |  |  |  |  | 148.9 |
Less: Noncontrolling interests |  |  |  |  |  |  | 6.6 |
Data Driven Safety, LLC [Member] |  |  |  |  |  |  |  |
Cash and cash equivalents | [1] |  |  |  |  |  | 2.5 |
Accounts receivable |  |  |  |  |  |  | 1.0 |
Other current assets |  |  |  |  |  |  | 2.0 |
Fixed assets |  |  |  |  |  |  | 0.0 |
Operating lease right-of-use assets, net |  |  |  |  |  |  | 0.4 |
Intangible assets |  |  |  |  |  |  | 42.1 |
Goodwill, Ending Balance |  |  |  |  |  |  | 74.1 |
Total assets acquired |  |  |  |  |  |  | 122.1 |
Operating lease liabilities |  |  |  |  |  |  | 0.4 |
Deferred income tax, net |  |  |  |  |  |  | 0.0 |
Other noncurrent liabilities |  |  |  |  |  |  | 21.7 |
Total liabilities assumed |  |  |  |  |  |  | 25.2 |
Net assets acquired |  |  |  |  |  |  | 96.9 |
Less: cash acquired |  |  |  |  |  |  | 3.4 |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  | $ 93.5 |  |  |  | 93.5 |
Other assets |  |  |  |  |  |  | 0.0 |
Current liabilities | [1] |  |  |  |  |  | 2.7 |
Deferred revenues |  |  |  |  |  |  | 0.4 |
Net cash purchase price |  |  | $ 93.5 |  |  |  | 93.5 |
Less: Noncontrolling interests |  |  |  |  |  |  | 0.0 |
The 2021 Acquisitions [Member] |  |  |  |  |  |  |  |
Cash and cash equivalents | [1] |  |  |  |  |  | 6.4 |
Accounts receivable |  |  |  |  |  |  | 4.2 |
Other current assets |  |  |  |  |  |  | 3.0 |
Fixed assets |  |  |  |  |  |  | 1.5 |
Operating lease right-of-use assets, net |  |  |  |  |  |  | 5.9 |
Intangible assets |  |  |  |  |  |  | 109.4 |
Goodwill, Ending Balance |  |  |  |  |  |  | 235.6 |
Total assets acquired |  |  |  |  |  |  | 366.1 |
Operating lease liabilities |  |  |  |  |  |  | 6.0 |
Deferred income tax, net |  |  |  |  |  |  | 19.5 |
Other noncurrent liabilities |  |  |  |  |  |  | 21.7 |
Total liabilities assumed |  |  |  |  |  |  | 55.5 |
Net assets acquired |  |  |  |  |  |  | 310.6 |
Less: cash acquired |  |  |  |  |  |  | 7.3 |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  |  |  | 276.9 |
Other assets |  |  |  |  |  |  | 0.1 |
Current liabilities | [1] |  |  |  |  |  | 6.5 |
Deferred revenues |  |  |  |  |  |  | 1.8 |
Net cash purchase price |  |  |  |  |  |  | 276.9 |
Less: Noncontrolling interests |  |  |  |  |  |  | $ 26.4 |
[1] | Within cash and cash equivalents, there is $5.7 million of restricted cash related to Franco Signor's professional administrative services for Medicare Set Asides, with an offsetting liability of $5.7 million included within current liabilities.

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-13 + Details
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- Definition Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, and accrued liabilities assumed at the acquisition date. + References No definition available. + Details
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