Basis of Presentation (Policies)	3 Months Ended
Basis of Presentation (Policies)	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net Parent Investment	Net Parent Investment In the consolidated statements of equity, the net parent investment represents WPC’s historical investment in NLOP prior to the Spin-Off, accumulated net earnings after taxes, and the net effect of transactions between NLOP and WPC.
Earnings Per Share	Earnings Per Share Basic earnings per share is calculated by dividing net income available to common shareholders by the weighted-average number of shares of common shares outstanding during the year. Diluted earnings per share reflects potentially dilutive securities using the treasury stock method, except when the effect would be anti-dilutive. Earnings per share is computed by dividing the net loss for the period by the weighted-average number of common shares outstanding during the period post Spin-Off. For the three months ended March 31, 2024, we recognized net loss. Therefore, all potentially dilutive securities were antidilutive and accordingly, basic net loss per share equals diluted net loss per share for the three months ended March 31, 2024. The calculation of basic and diluted earnings per share for any of the periods presented prior to the Spin-Off were based on the number of shares outstanding on November 1, 2023. For periods prior to the Spin-Off, it is assumed that there are no dilutive equity instruments as there were no NLOP stock-based awards outstanding prior to the Spin-Off
Intangible Assets and Liabilities and Goodwill	We have net lease intangibles that are being amortized over periods ranging from one year to 40 years. In-place lease intangibles, at cost are included in In-place lease intangible assets and other in the consolidated financial statements. Above-market rent intangibles, at cost are included in Above-market rent intangible assets in the consolidated financial statements. Accumulated amortization of in-place lease and above-market rent intangibles is included in Accumulated depreciation and amortization in the consolidated financial statements. Below-market rent intangibles are included in Below-market rent intangible liabilities, net in the consolidated financial statements. Amortization of below-market rent and above-market rent intangibles is recorded as an adjustment to Lease revenues and amortization of in-place lease intangibles is included in Depreciation and amortization.
Fair Value Measurements	The fair value of an asset is defined as the exit price, which is the amount that would either be received when an asset is sold or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The guidance establishes a three-tier fair value hierarchy based on the inputs used in measuring fair value. These tiers are: Level 1, for which quoted market prices for identical instruments are available in active markets, such as money market funds, equity securities, and U.S. Treasury securities; Level 2, for which there are inputs other than quoted prices included within Level 1 that are observable for the instrument, such as certain derivative instruments including interest rate caps, interest rate swaps, and foreign currency collars; and Level 3, for securities that do not fall into Level 1 or Level 2 and for which little or no market data exists, therefore requiring us to develop our own assumptions. Items Measured at Fair Value on a Recurring Basis The methods and assumptions described below were used to estimate the fair value of each class of financial instrument. For significant Level 3 items, we have also provided the unobservable inputs. Derivative Assets — Our derivative assets, which are included in Other assets, net in the consolidated financial statements, are comprised of interest rate caps (Note 8). The valuation of our derivative instruments is determined using a discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, as well as observable market-based inputs, including interest rate curves, spot and forward rates, and implied volatilities. We incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative instruments for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. These derivative instruments were classified as Level 2 as these instruments are custom, over-the-counter contracts with various bank counterparties that are not traded in an active market.