v3.26.1
Cover
 12 Months Ended
Dec. 31, 2025
shares
Entity Addresses [Line Items]  
Document Type 20-F
Amendment Flag false
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Shell Company Report false
Document Period End Date Dec. 31, 2025
Document Fiscal Period Focus FY
Document Fiscal Year Focus 2025
Current Fiscal Year End Date --12-31
Entity File Number 001-34153
Entity Registrant Name Global Ship Lease, Inc.
Entity Central Index Key 0001430725
Entity Incorporation, State or Country Code 1T
Entity Address, Address Line One 9 Irodou Attikou Street,
Entity Address, City or Town Athens
Entity Address, Country GR
Entity Address, Postal Zip Code 14561
Title of 12(b) Security Class A common shares, par value of $0.01 per share
Trading Symbol GSL
Security Exchange Name NYSE
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
Document Accounting Standard U.S. GAAP
Entity Shell Company false
Entity Common Stock, Shares Outstanding 35,913,628
ICFR Auditor Attestation Flag true
Document Financial Statement Error Correction [Flag] false
Auditor Firm ID 1387
Auditor Name PricewaterhouseCoopers S.A.
Auditor Location Athens, Greece
Business Contact [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One 9 Irodou Attikou Street,
Entity Address, City or Town Athens
Entity Address, Country GR
Entity Address, Postal Zip Code 14561
City Area Code + 30
Local Phone Number 210 6233670
Contact Personnel Name Anastasios Psaropoulos