XML 14 R1.htm IDEA: XBRL DOCUMENT v3.25.2
Cover Page - shares
 9 Months Ended
Jun. 28, 2025
Jul. 31, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 28, 2025  
Document Transition Report false  
Entity File Number 001-32833  
Entity Registrant Name TransDigm Group Incorporated  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 41-2101738  
Entity Address, Address Line One 1350 Euclid Avenue,  
Entity Address, Address Line Two Suite 1600,  
Entity Address, City or Town Cleveland,  
Entity Address, State or Province OH  
Entity Address, Postal Zip Code 44115  
City Area Code 216  
Local Phone Number 706-2960  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Shell Company false  
Title of 12(b) Security Common Stock, $0.01 par value  
Trading Symbol TDG  
Security Exchange Name NYSE  
Entity Common Stock, Shares Outstanding   56,350,285
Amendment Flag false  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0001260221  
Current Fiscal Year End Date --09-30