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Business Combinations - CPA Global Narrative (Details) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 10 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 21, 2021 | Oct. 01, 2020 | Feb. 28, 2020 | Mar. 31, 2021 | Jan. 31, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of common stock, net (in shares) | 131,564 |  |  |  |  |  |  |  |  |
CPA Global |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of ownership |  | 100.00% |  |  |  |  |  |  |  |
Cash acquired |  | $ 99,275,000 |  |  |  |  |  |  |  |
Equity Holdback Consideration |  | 46,485,000 |  |  |  |  |  |  |  |
Clarivate stock to be issued |  | $ 6,761,515,000 |  |  |  |  |  |  |  |
Shares Issued Percentage of Ownership |  | 35.00% |  |  |  |  |  |  |  |
Cash |  | $ 2,078,084,000 |  |  |  |  |  |  |  |
Newly issued ordinary shares (in shares) |  | 218,183,778 |  |  |  |  |  | 1,500,000 |  |
Stock issued |  | 216,683,778 |  |  | 1,500,000 |  |  |  |  |
Goodwill deductible amount |  | $ 0 |  |  |  |  |  |  |  |
Transaction costs |  |  |  |  |  | $ 2,682,000 |  | $ 4,860,000 | $ 8,521,000 |
Decrease to goodwill, measurement period adjustments |  |  |  |  |  |  |  | 20,493,000 |  |
Fair value of acquired identifiable assets and liabilities |  |  |  |  |  | 21,158,000 |  | 21,158,000 |  |
Business Combination, Provisional Information Initial Accounting Incomplete Adjustment, Payments to acquire business net of cash acquired |  |  |  |  |  | 665,000 |  | 665,000 |  |
Deferred revenue haircut |  |  |  |  |  | 50,000 |  | 4,399,000 |  |
CPA Global | Deferred Income Tax Charge |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Decrease in legal accrual, measurement period adjustment |  |  |  |  |  |  |  | 13,405,000 |  |
CPA Global | Accrued Liabilities |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities, Valuation Change of Accruals for Others |  |  |  |  |  |  |  | (16,512,000) |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities, Valuation Change |  |  |  |  |  |  |  | 61,000,000 |  |
Decrease in legal accrual, measurement period adjustment |  |  |  |  |  |  |  | 44,488,000 |  |
CPA Global | Liabilities, Total |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Decrease in legal accrual, measurement period adjustment |  |  |  |  |  |  |  | (32,347,000) |  |
CPA Global | Accounts Payable |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Decrease in legal accrual, measurement period adjustment |  |  |  |  |  |  |  | 290,000 |  |
CPA Global | Long-term Contract with Customer |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Decrease in legal accrual, measurement period adjustment |  |  |  |  |  |  |  | 15,000 |  |
CPA Global | Short-term Contract with Customer |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Decrease in legal accrual, measurement period adjustment |  |  |  |  |  |  |  | (989,000) |  |
CPA Global | Deferred Income Tax Net |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Decrease in legal accrual, measurement period adjustment |  |  |  |  |  |  |  | 15,122,000 |  |
CPA Global | Accounts Receivable |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets, Valuation Decrease |  |  |  |  |  |  |  | (2,171,000) |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets, Valuation Change |  |  |  |  |  |  |  | 9,306,000 |  |
Increase in accounts receivable, measurement period adjustment |  |  |  |  |  |  |  | 7,135,000 |  |
CPA Global | Other current assets |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in accounts receivable, measurement period adjustment |  |  |  |  |  |  |  | (370,000) |  |
CPA Global | Assets, Total |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in accounts receivable, measurement period adjustment |  |  |  |  |  |  |  | (11,189,000) |  |
CPA Global | Prepaid Expenses and Other Current Assets |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in accounts receivable, measurement period adjustment |  |  |  |  |  |  |  | (158,000) |  |
CPA Global | Noncurrent assets |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in accounts receivable, measurement period adjustment |  |  |  |  |  |  |  | 1,123,000 |  |
CPA Global | Property, Plant and Equipment |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Decrease in legal accrual, measurement period adjustment |  |  |  |  |  |  |  | (1,002,000) |  |
CPA Global | Deferred Tax Asset [Domain] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Decrease in legal accrual, measurement period adjustment |  |  |  |  |  |  |  | $ (1,717,000) |  |
CPA Global | Interest rate swap |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Loss on contract termination |  | 22,262,000 |  |  |  |  |  |  |  |
CPA Global | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Long-term Debt |  | $ 2,055,822,000 |  |  |  |  |  |  |  |
CPA Global | Maximum |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of common stock, net (in shares) |  | 218,183,778 |  |  |  |  |  |  |  |
Newly issued ordinary shares (in shares) |  | 218,306,663 |  |  |  |  |  |  |  |
Decision Resources Group |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of ownership |  |  | 100.00% |  |  |  |  |  |  |
Cash acquired |  |  | $ 20,777,000 |  |  |  |  |  |  |
Cash |  |  | $ 900,000,000 |  |  |  |  |  |  |
Newly issued ordinary shares (in shares) |  |  | 2,895,638 | 2,895,638 |  |  |  | 2,895,638 |  |
Goodwill deductible amount |  |  | $ 0 |  |  |  |  |  |  |
Transaction costs |  |  |  |  |  | $ 0 | $ 25,237,000 | $ 24,410,000 | 50,702,000 |
Decrease to goodwill, measurement period adjustments |  |  |  |  |  |  |  |  |  | $ (1,804,000)
Deferred revenue haircut |  |  |  |  |  |  | $ (2,017,000) |  | $ (6,822,000) |

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