| Cover | Sep. 09, 2022 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 09, 2022 |
| Entity File Number | 001-39576 |
| Entity Registrant Name | Global Business Travel Group, Inc. |
| Entity Central Index Key | 0001820872 |
| Entity Tax Identification Number | 98-0598290 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 666 3rd Avenue |
| Entity Address, Address Line Two | 4th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10017 |
| City Area Code | 212 |
| Local Phone Number | 679-1600 |
| Written Communications | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Common Class A [Member] | |
| Title of 12(b) Security | Class A common stock, $0.0001 per share |
| Trading Symbol | GBTG |
| Security Exchange Name | NYSE |
| Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per share [Member] | |
| Title of 12(b) Security | Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per share |
| Trading Symbol | GBTG.WS |
| Security Exchange Name | NYSE |
