Description of the Business, Basis of Presentation and Accounting Policy Updates	9 Months Ended
	Sep. 30, 2020
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, 2020; 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, 2020 and 2019, and the consolidated statements of cash flows for the nine months ended September 30, 2020 and 2019 are unaudited. The consolidated balance sheet as of December 31, 2019, 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, 2020 are not necessarily indicative of the results to be expected for the fiscal year ending December 31, 2020 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, 2019 included in the Company's Annual Report on Form 10-K which was filed with the SEC on February 14, 2020. 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 two largest customers, CMA CGM S.A. and Mediterranean Shipping Company S.A., accounted for 21% and 15%, respectively, of the Company's lease billings during the nine months ended September 30, 2020. 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 Adopted Accounting Standards Updates Measurement of Credit Losses on Financial Instruments In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326) and subsequently issued amendments. The guidance affects the Company's net investment in finance leases and accounts receivable for sales of equipment. The standard requires the measurement of expected credit losses to be based on relevant information from past events, including historical experiences, current conditions and reasonable and supportable forecasts that affect collectability. The Company adopted the standard and its related amendments as of January 1, 2020. The Company has evaluated the impact of this ASU and concluded that the adoption of this standard did not have a significant impact on its consolidated financial statements. Reference Rate Reform In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The guidance provides optional practical expedients for applying U.S. GAAP to hedging relationships affected by reference rate reform. The guidance is applicable to the Company's debt agreements, hedging relationships, and other transactions that reference LIBOR. The Company adopted the standard and certain of its related amendments as of March 12, 2020. By adopting this standard, it will help ease the burden that the Company may face due to the transition away from certain reference rates, specifically LIBOR, which is the predominant reference rate in many of the Company’s debt agreements and hedging relationships. The practical expedients applicable to the Company are as follows: (1) contract modifications due to reference rate reform can be treated as continuations of the existing contract and potential changes to interest rate risk can be disregarded when asserting the probability of the forecasted hedged transactions; (2) hedge accounting can continue to be used for hedging relationships where critical terms change due to reference rate reform; and (3) effectiveness assessments can be performed in ways that disregard certain mismatches due to reference rate reform. The Company concluded that the adoption of this standard will not have a significant impact on our consolidated financial statements. Accounting Policy Update Allowance for Doubtful Accounts-Net investment in finance leases and accounts receivable for sales of equipment Upon adoption of Topic 326, the Company measures expected credit loss on net investment in finance leases and accounts receivable for sales of equipment by evaluating the overall credit quality of its customers. Expected credit losses for these financial assets are estimated using historical experience which includes economic cycles, customer payment history, management's assessment of the customer's financial condition, and consideration of current conditions and reasonable forecasts.