Debt Related Costs, Extinguishment

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the period from the transaction date over which interest expense is recognized preceding early purchase options, if any.

+ References

No definition available.

+ Details

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Namespace Prefix:	trtn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Existing Notes Called

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of short-term and long-term debt and lease obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
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-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfDebtExtinguishmentCosts
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=trtn_SecondRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=trtn_LineofCreditandSecondRevolvingCreditFacilityMember
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Data Type:	na
Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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- Details

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- Details

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- Details

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- Details

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Debt - Narrative (Details) $ in Thousands			9 Months Ended
Debt - Narrative (Details) $ in Thousands	Sep. 21, 2020 USD ($)	Jan. 31, 2020 USD ($)	Sep. 30, 2020 USD ($) asset-backed_warehouse_facilitiy	Dec. 31, 2019 USD ($)	Feb. 08, 2019 USD ($)
Debt Instrument [Line Items]
Debt and Lease Obligation			$ 6,469,935	$ 6,684,162
Level 2
Debt Instrument [Line Items]
Debt and Lease Obligation			6,563,300	6,747,800
Asset-Backed Securitization Warehouse Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			800,000		$ 800,000
Revolving credit facilities
Debt Instrument [Line Items]
Debt and Lease Obligation			716,000	410,000
Maximum borrowing capacity			1,560,000
Line of Credit and Second Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity			724,100
Capital lease obligations
Debt Instrument [Line Items]
Debt and Lease Obligation			17,852	27,024
Repayments of debt		$ 7,500
Term Loan
Debt Instrument [Line Items]
Repayments of debt	$ 264,900
Debt related costs	$ 300
Asset-backed securitization warehouse
Debt Instrument [Line Items]
Debt and Lease Obligation			195,000	370,000
Debt related costs			$ 22,300
Number of Existing Notes Called \| asset-backed_warehouse_facilitiy			3
Total Offering			$ 1,783,100
Payment for prepayment debt penalty			1,800
Institutional notes
Debt Instrument [Line Items]
Debt and Lease Obligation			1,694,171	1,957,557
Term loan facility
Debt Instrument [Line Items]
Debt and Lease Obligation			$ 860,000	$ 1,200,375
Minimum
Debt Instrument [Line Items]
Finance Lease Period Over Which Interest Expense Recognized Preceding Early Purchase Option			5 years
Minimum \| Institutional notes
Debt Instrument [Line Items]
Debt Instrument, Term			7 years
Maximum
Debt Instrument [Line Items]
Finance Lease Period Over Which Interest Expense Recognized Preceding Early Purchase Option			7 years
Maximum \| Institutional notes
Debt Instrument [Line Items]
Debt Instrument, Term			12 years
London Interbank Offered Rate (LIBOR) \| Asset-Backed Securitization Warehouse Facility
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.75%
London Interbank Offered Rate (LIBOR) \| Term loan facility
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.85%