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Other Business Combinations - Narrative (Details) - USD ($)
$ in Millions
Feb. 04, 2022
Nov. 19, 2021
Nov. 24, 2020
Mar. 06, 2020
Contracts and backlog intangible        
Business Acquisition [Line Items]        
Acquired finite-lived intangible assets, weighted average useful life     9 years  
Buffalo Group        
Business Acquisition [Line Items]        
Consideration transferred     $ 190.1  
Business combination consideration paid in cash     182.4  
Contingent consideration     7.7  
Long term liabilities     7.7  
Cash and cash equivalents     $ 8.4  
Wood Group        
Business Acquisition [Line Items]        
Goodwill recognized expected to be deductible for tax purposes       $ 0.0
Business combination, enterprise value       246.0
Business combinations, less cash       317.9
Cash and cash equivalents       $ 24.3
Wood Group | Technology        
Business Acquisition [Line Items]        
Acquired finite-lived intangible assets, weighted average useful life       15 years
Wood Group | Contracts and backlog intangible        
Business Acquisition [Line Items]        
Acquired finite-lived intangible assets, weighted average useful life       12 years
StreetLightData, Inc.        
Business Acquisition [Line Items]        
Business combination consideration paid in cash $ 190.8      
Goodwill recognized expected to be deductible for tax purposes 0.0      
Cash and cash equivalents 7.3      
Business combination consideration equity issued 0.9      
Money stock options 5.2      
Transferred liabilities incurred $ 1.0      
StreetLightData, Inc. | Technology        
Business Acquisition [Line Items]        
Acquired finite-lived intangible assets, weighted average useful life 5 years      
StreetLightData, Inc. | Customer Relationships, Contracts and Backlog        
Business Acquisition [Line Items]        
Acquired finite-lived intangible assets, weighted average useful life 4 years      
StreetLightData, Inc. | Contracts and backlog intangible        
Business Acquisition [Line Items]        
Acquired finite-lived intangible assets, weighted average useful life 9 years      
BlackLynx        
Business Acquisition [Line Items]        
Business combination consideration paid in cash   $ 235.4    
Long term liabilities   5.3    
Goodwill recognized expected to be deductible for tax purposes   0.0    
Cash and cash equivalents   $ 5.1    
BlackLynx | Technology        
Business Acquisition [Line Items]        
Acquired finite-lived intangible assets, weighted average useful life   8 years    
BlackLynx | Contracts and backlog intangible        
Business Acquisition [Line Items]        
Acquired finite-lived intangible assets, weighted average useful life   4 years