Summary of Business and Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2021
Text block [abstract]  
Schedule of Computer Hardware and Other Property - Estimated Useful Lives
Property and equipment are recorded at cost and depreciated on a straight-line basis over their estimated useful lives as follows:
 
 
Buildings and building improvements
  
10-40 years
  
 
 
 
Computer equipment
  
3
years
  
 
 
 
Furniture, fixtures and other equipment
  
5-7
years
  
 
 
Schedule of Other Identifiable Assets - Estimated Useful Lives
Identifiable intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives as follows:
 
Trade names
  
3-20 years
  
 
 
Customer relationships
  
6-30 years
  
 
 
Databases and content
  
5-30
years
  
 
 
Other
  
10-30 years