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Segment Information - Additional Information (Details) - segment
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting Information [Line Items]      
Number of business segments 2    
Travel Solutions | Revenue from Contract with Customer Benchmark | Transaction Based Revenue      
Segment Reporting Information [Line Items]      
Concentration risk percentage 79.00% 91.00% 92.00%
Hospitality Solutions | Revenue from Contract with Customer Benchmark | Transaction Based Revenue      
Segment Reporting Information [Line Items]      
Concentration risk percentage 68.00% 80.00% 81.00%