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

No definition available.

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- Definition

The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

+ Details

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- 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 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

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- Definition

Number of States

+ References

No definition available.

+ Details

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Namespace Prefix:	wpc_
Data Type:	xbrli:integerItemType
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Land, Buildings and Improvements, and Assets Held for Sale - Acquisition of Real Estate (Details) $ in Thousands																									2 Months Ended	12 Months Ended
	Dec. 22, 2025 USD ($) property	Dec. 18, 2025 USD ($) state property	Dec. 17, 2025 USD ($) property	Dec. 16, 2025 USD ($) property	Dec. 10, 2025 USD ($) property	Nov. 26, 2025 USD ($) property	Oct. 02, 2025 USD ($) property	Oct. 01, 2025 USD ($) property	Sep. 24, 2025 USD ($) property	Sep. 23, 2025 USD ($) property	Sep. 18, 2025 USD ($) property	Aug. 26, 2025 USD ($) property	Aug. 06, 2025 USD ($) property	Jul. 31, 2025 USD ($) property	Jul. 16, 2025 USD ($) property	Jul. 11, 2025 USD ($) state	Jun. 17, 2025 USD ($) property	Jun. 16, 2025 USD ($) property	May 13, 2025 USD ($) property	Apr. 23, 2025 USD ($) property	Apr. 11, 2025 USD ($) property	Mar. 26, 2025 USD ($) property	Mar. 03, 2025 USD ($) property state	Feb. 26, 2025 USD ($) property state	Aug. 28, 2025 USD ($) property	Dec. 31, 2025 USD ($) property	Dec. 31, 2024 USD ($) property	Dec. 31, 2023 USD ($) property	Dec. 20, 2025 state
Property, Plant and Equipment
Total Capitalized Costs \| $																										$ 1,657,339	$ 1,128,809	$ 1,211,397
Operating lease
Property, Plant and Equipment
Number of properties (property)																										173	25	12
Total Capitalized Costs \| $																										$ 1,656,317	$ 1,200,000	$ 1,200,000
Operating lease \| Various, United States \| Industrial, Warehouse
Property, Plant and Equipment
Number of properties (property)																								59
Total Capitalized Costs \| $																								$ 136,022
Number of states \| state																								13
Operating lease \| Various, United States \| Retail
Property, Plant and Equipment
Number of properties (property)		10			8																		4		8
Total Capitalized Costs \| $		$ 321,826			$ 15,986																		$ 8,474		$ 15,796
Number of states \| state		9														4							3						5
Operating lease \| Various, United States \| Specialty (Healthcare)
Property, Plant and Equipment
Number of properties (property)							4
Total Capitalized Costs \| $							$ 137,275
Operating lease \| Mishawaka, Indiana \| Specialty (Healthcare)
Property, Plant and Equipment
Number of properties (property)																						1
Total Capitalized Costs \| $																						$ 31,762
Operating lease \| Various, Germany \| Industrial
Property, Plant and Equipment
Number of properties (property)																					3
Operating lease \| Various, Germany and La Garriga, Spain \| Industrial
Property, Plant and Equipment
Number of properties (property)																					4
Total Capitalized Costs \| $																					$ 42,981
Operating lease \| Santa Fe Springs, California \| Warehouse
Property, Plant and Equipment
Number of properties (property)																				1
Total Capitalized Costs \| $																				$ 128,043
Operating lease \| Various, Italy and Málaga and Burgos, Spain \| Industrial
Property, Plant and Equipment
Number of properties (property)																			9
Total Capitalized Costs \| $																			$ 73,280
Operating lease \| Chattanooga, Tennessee \| Industrial
Property, Plant and Equipment
Number of properties (property)																		1
Total Capitalized Costs \| $																		$ 20,247
Operating lease \| Newark, New Jersey and Boston, Massachusetts \| Industrial
Property, Plant and Equipment
Number of properties (property)																	2
Total Capitalized Costs \| $																	$ 101,856
Operating lease \| San Francisco, California \| Industrial
Property, Plant and Equipment
Number of properties (property)																	1
Total Capitalized Costs \| $																$ 49,604
Operating lease \| Loughborough and Ikeston, United Kingdom \| Retail
Property, Plant and Equipment
Number of properties (property)															2
Total Capitalized Costs \| $															$ 68,308
Operating lease \| Houston, Texas \| Industrial
Property, Plant and Equipment
Number of properties (property)														1
Total Capitalized Costs \| $														$ 18,357
Operating lease \| Various, France and Medina del Campo, Spain \| Industrial
Property, Plant and Equipment
Number of properties (property)														4
Total Capitalized Costs \| $														$ 56,388
Operating lease \| Various, France \| Industrial
Property, Plant and Equipment
Number of properties (property)														3
Operating lease \| Various, Italy \| Industrial, Warehouse
Property, Plant and Equipment
Number of properties (property)													35
Total Capitalized Costs \| $													$ 81,900
Operating lease \| Various, Italy \| Industrial
Property, Plant and Equipment
Number of properties (property)																			7
Operating lease \| Monterrey and San Juan del Rio, Mexico \| Industrial
Property, Plant and Equipment
Number of properties (property)												4
Total Capitalized Costs \| $												$ 44,033
Operating lease \| Mesquite, Texas \| Industrial
Property, Plant and Equipment
Number of properties (property)											1
Total Capitalized Costs \| $											$ 92,271
Operating lease \| Kissimmee, Florida \| Retail
Property, Plant and Equipment
Number of properties (property)										1
Total Capitalized Costs \| $										$ 14,338
Operating lease \| Toronto and Markham, Canada; and Lee’s Summit, Missouri \| Industrial
Property, Plant and Equipment
Number of properties (property)									3
Total Capitalized Costs \| $									$ 67,170
Operating lease \| Compton, California \| Warehouse
Property, Plant and Equipment
Number of properties (property)								1
Total Capitalized Costs \| $								$ 5,937
Operating lease \| San Juan del Rio, Mexico \| Industrial
Property, Plant and Equipment
Number of properties (property)							1
Total Capitalized Costs \| $							$ 9,999
Operating lease \| New Hartford, New York \| Retail (Car Wash)
Property, Plant and Equipment
Number of properties (property)						1
Total Capitalized Costs \| $						$ 5,084
Operating lease \| Wasserburg am Inn, Germany \| Industrial
Property, Plant and Equipment
Number of properties (property)				1
Total Capitalized Costs \| $				$ 27,142
Operating lease \| Cesena and Gela, Italy \| Industrial, Warehouse
Property, Plant and Equipment
Number of properties (property)			2
Total Capitalized Costs \| $			$ 2,218
Operating lease \| Navarra and Zaragoza, Spain \| Warehouse
Property, Plant and Equipment
Number of properties (property)	4
Total Capitalized Costs \| $	$ 80,020