Business Description and Basis of Presentation	12 Months Ended
Business Description and Basis of Presentation	Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Description and Basis of Presentation	Business Description and Basis of Presentation Global Business Travel Group, Inc. (“GBTG”), and its consolidated subsidiaries (GBTG, together with its consolidated subsidiaries, the "Company"), operating as American Express Global Business Travel ("Amex GBT"), is a leading technology and services company for travel, expense and meetings & events. The Company's comprehensive and competitive marketplace, industry leading software, Artificial Intelligence ("AI")-powered efficiencies and 24/7 global support team offer solutions, savings, and flexibility for companies of every size. GBTG is a Delaware corporation and tax resident in the United States of America (“U.S.”). On March 24, 2024, GBTG entered into an Agreement and Plan of Merger (as amended, the “Merger Agreement”) with CWT Holdings, LLC, a Delaware limited liability company (“CWT”). On September 2, 2025, GBTG completed the acquisition of CWT in accordance with the terms of the Merger Agreement (see note 3 - Business Acquisitions). The consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).

Global Business Travel Group, Inc. 10-K