Area of a real estate property.

No definition available.

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

+ References

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-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
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Balance Type:	debit
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

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

- Definition

Amount of fee income including, but not limited to, managerial assistance, servicing of investment, and origination and commitment fees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(1)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

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

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Subparagraph (b)(2)
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Data Type:	xbrli:stringItemType
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
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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-Subparagraph (SX 210.5-02(22)(b))
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Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
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-Publisher FASB
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-SubTopic 10
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-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

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- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
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-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
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-Subparagraph (SX 210.7-03(a)(16)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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

- Definition

Annual Base Rent

+ References

No definition available.

+ Details

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

- Definition

Annual Management Fee

+ References

No definition available.

+ Details

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Namespace Prefix:	wpc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Business Disposal Costs, Advisory Fees

+ References

No definition available.

+ Details

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

- Definition

Business Disposal Costs, Reimbursable

+ References

No definition available.

+ Details

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Namespace Prefix:	wpc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number Of Encumbered Properties

+ References

No definition available.

+ Details

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Namespace Prefix:	wpc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of tenants occupying the real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	wpc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Share Conversion Rate

+ References

No definition available.

+ Details

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Namespace Prefix:	wpc_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_CorporationMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=wpc_ParkingGarageMember
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Period Type:

- Details

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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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Period Type:

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NLOP Spin-Off - Narratives (Details) $ / shares in Units, ft² in Millions		9 Months Ended	12 Months Ended		24 Months Ended
	Nov. 01, 2023 USD ($) ft² investment $ / shares	Sep. 30, 2023 USD ($) property	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Non-recourse mortgages, net						$ 140,646,000	$ 401,821,000
Line of credit, maximum borrowing amount						4,350,000,000
Financing cost						$ 30,067,000
Affiliated Entity
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Annual management fee	$ 7,500,000
Fee income	$ 4,000,000
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Share conversion rate \| $ / shares	$ 0.0667
Business exit costs	$ 61,600,000
Advisory fees			$ 5,100,000	$ 4,900,000	$ 10,000,000
Business disposal costs, reimbursable	51,600,000
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff \| NLOP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Annual base rent		$ 145,000,000
Number of encumbered properties \| property		10
Non-recourse mortgages, net	$ 164,743,000	$ 164,700,000
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff \| Office \| NLOP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Square footage of real estate properties \| ft²	9.3
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff \| Corporation \| NLOP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Number of tenants \| investment	62
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff \| Parking Garage \| NLOP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Square footage of real estate properties \| ft²	0.6
Net Lease Office Properties Financing Arrangements \| Secured Debt
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Financing cost	$ 14,400,000
Line of Credit \| Net Lease Office Properties Debt Facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Line of credit, maximum borrowing amount		$ 455,000,000
Proceeds from line of credit	$ 343,900,000