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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Goodwill And Intangible Assets [Line Items]        
Amortization expense $ 13.8 $ 17.7 $ 27.8 $ 35.3
Estimated amortization expense, remainder of 2022 27.7   27.7  
Estimated amortization expense, year 2023 54.4   54.4  
Estimated amortization expense, year 2024 53.9   53.9  
Estimated amortization expense, year 2025 53.4   53.4  
Estimated amortization expense, year 2026 52.5   52.5  
Estimated amortization expense, thereafter $ 553.3   $ 553.3  
Thomson Reporting Unit [Member] | Maximum [Member]        
Goodwill And Intangible Assets [Line Items]        
Reporting unit, percentage of fair value in excess of carrying amount 10.00%   10.00%  
All Other Reporting Units [Member]        
Goodwill And Intangible Assets [Line Items]        
Reporting unit, percentage of fair value in excess of carrying amount 10.00%   10.00%