v3.25.1
Cover - shares
3 Months Ended
Mar. 31, 2025
May 02, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Entity File Number 001-39576  
Entity Registrant Name Global Business Travel Group, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 98-0598290  
Entity Address, Address Line One 666 3rd Avenue, 4th Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10017  
City Area Code 646  
Local Phone Number 344-1290  
Title of 12(b) Security Class A common stock, par value $0.0001 per share  
Trading Symbol GBTG  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   478,702,748
Amendment Flag false  
Document Fiscal Year Focus 2025  
Entity Central Index Key 0001820872  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q1