Description of the Business, Basis of Presentation and Accounting Policy Updates	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business, Basis of Presentation and Accounting Policy Updates	Description of the Business, Basis of Presentation and Accounting Policy Updates Description of the Business Triton International Limited ("Triton" or the "Company"), through its subsidiaries, leases intermodal transportation equipment, primarily maritime containers, and provides maritime container management services through a worldwide network of service subsidiaries, third-party depots and other facilities. The majority of the Company's business is derived from leasing its containers to shipping line customers through a variety of long-term and short-term contractual lease arrangements. The Company also sells containers from its equipment leasing fleet as well as containers specifically acquired for resale from third parties. The Company's registered office is located in Bermuda. Basis of Presentation The unaudited consolidated financial statements and accompanying notes have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these financial statements do not include all information and footnotes required by GAAP for complete financial statements. The interim consolidated balance sheet as of September 30, 2021; the consolidated statements of operations, the consolidated statements of comprehensive income, and the consolidated statements of shareholders' equity for the three and nine months ended September 30, 2021 and 2020, and the consolidated statements of cash flows for the nine months ended September 30, 2021 and 2020 are unaudited. The consolidated balance sheet as of December 31, 2020, included herein, was derived from the audited financial statements as of that date, but does not include all disclosures required by GAAP. The unaudited interim financial statements have been prepared on a basis consistent with the Company's annual financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments necessary to state fairly the Company's financial position, results of operations, comprehensive income, shareholders' equity, and cash flows for the periods presented. The financial data and the other financial information disclosed in the notes to the financial statements related to these periods are also unaudited. The consolidated results of operations for the three and nine months ended September 30, 2021 are not necessarily indicative of the results to be expected for the fiscal year ending December 31, 2021 or for any other future annual or interim period. These financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto as of and for the year ended December 31, 2020 included in the Company's Annual Report on Form 10-K which was filed with the SEC on February 16, 2021. The unaudited consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Certain changes in presentation have been made to conform the prior period presentation to current period reporting. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and disclosure of contingent assets and liabilities in the financial statements. Such estimates include, but are not limited to, the Company's estimates in connection with leasing equipment, including residual values and depreciable lives, values of assets held for sale and other long lived assets, provision for income tax, allowance for doubtful accounts, share-based compensation, goodwill and intangible assets. Actual results could differ from those estimates. Concentration of Credit Risk The Company's equipment leases and trade receivables subject it to potential credit risk. The Company extends credit to its customers based upon an evaluation of each customer's financial condition and credit history. Evaluations of the financial condition and associated credit risk of customers are performed on an ongoing basis. The Company's three largest customers accounted for 20%, 15%, and 10%, respectively, of the Company's lease billings during the nine months ended September 30, 2021. Fair Value Measurements For information on the fair value of equipment held for sale, debt, and the fair value of derivative instruments, please refer to Note 2 - "Equipment Held for Sale", Note 7 - "Debt" and Note 8 - "Derivative Instruments", respectively. New Accounting Pronouncements Recently Issued Accounting Standards Update Lessors - Certain Leases with Variable Lease Payments In July 2021, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") 2021-05, Lease (Topic 842): Lessors - Certain Leases with Variable Lease Payments. This guidance amends the lease classification accounting for lessors for certain leases with variable lease payments that do not depend on a reference index or a rate and would have resulted in the recognition of a loss at lease commencement if classified as a sales-type or direct financing lease. Under the new guidance, these leases will be classified as an operating lease. The amendments are effective for fiscal years beginning after December 15, 2021, with early adoption permitted. The Company will adopt this standard on January 1, 2022. Based on the nature of our finance leases, the Company does not expect the adoption of this ASU to have a significant impact on the consolidated financial statements.