Schedule I Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Assets	$ 9,577,625	$ 8,713,571	$ 4,658,997
Common Stock, Value, Issued	807	744
Liabilities	7,367,799	6,906,834
Additional paid-in capital	889,168	690,418
Accumulated earnings	1,159,367	945,313
Accumulated other comprehensive income	26,942	26,758
Total shareholders' equity	2,076,284	1,663,233
Liabilities and Equity	9,577,625	8,713,571
Triton International Limited Holdings [Domain]
Condensed Financial Statements, Captions [Line Items]
IntercompanyReceivable	0	151
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	2,078,936	1,663,879
Assets	2,078,936	1,664,030
Common Stock, Value, Issued	807	744
Accounts Payable, Current	2,652	797
Liabilities	2,652	797
Additional paid-in capital	889,168	690,418
Accumulated earnings	1,159,367	945,313
Accumulated other comprehensive income	26,942	26,758
Total shareholders' equity	2,076,284	1,663,233
Liabilities and Equity	2,078,936	1,664,030
Undesignated Common Stock [Member]
Condensed Financial Statements, Captions [Line Items]
Common Stock, Value, Issued	0	0
Undesignated Common Stock [Member] \| Triton International Limited Holdings [Domain]
Condensed Financial Statements, Captions [Line Items]
Common Stock, Value, Issued	$ 0	$ 0

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.

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Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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